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Solve the following problem using two va...

Solve the following problem using two variables: A two digit number and the number with digits interchanged add up to 143. In the given number the digit in unit's place is 3 more than the digit in the ten's place. Find the original number.

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Solve the following word problems : The sum of a two digit number and the number obtained by interchanging the digits is 143. If the digit at the units place is 3 more than the digit at the tens place, find the original number.

The sum of two digit number and the number obtained by reversing the order of its digits is 143. The digit at ten's place is greater than digit at unit's place by 3. Find the original number.

The sum of a two digit number and the number obtained by reversing its digits in 121. Find the number, if its units place digit is greater than the tens place digit by 7.

How many three digit numbers are there, with no digit repeated?

How many two -digit numbers are there divisible by 3?

CHETANA PUBLICATION-Linear equations in two variables-EXERCISE
  1. Solve the following problem using two variables: A two digit number an...

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  2. To draw graph of 4x+5y=19,find y when x=1. Options: a) 4 b) 3 c) 2 d) ...

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  3. For simultaneous equations in variables x and y, Dx=49,Dy=-63, D=7 the...

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  4. Find the value of: |(5,3),(-7,-4)| a) -1 b) -41 c) 41 d) 1

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  5. To solve x+y=3,3x-2y-4=0 by determinant method, find D.

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  6. ax+by=c and mx+ny=d and an ne bm then these simultaneous equations hav...

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  7. The general form of linear equation in two variables is: a) ax+b=0 b...

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  8. …………...........is one of the solution of equation 3x-5y=10 : a) (0,2) ...

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  9. If 12x+13y=29 and 13x+12y=21 then the value of x+y is

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  10. Express the following information in mathematical form using x and y v...

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  11. Write Dx for the following simultaneous equations 3x+4y=8,x-2y=5 a) |(...

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  12. ………………..is the solution of given simultaneous equation x-y=7,x+y=11 a)...

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  13. When we consider two linear equations in two variables, such equations...

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  14. ………….is not a linear equation in two variables. a)x+7y=1 b)3x+4y-xy=0 ...

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  15. The linear equation in two variables is…………..a)3x+9=sqrt 2y+2 b)3x-4y+...

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  16. The pair of simultaneous equations from the following is…………………(1)2x+2...

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  17. Equation of X axis is……………..a)x=0 b)y=0 c)x=b d)y=a

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  18. The co-ordinates of the point of origin are……………a)(0,0) b)(1,0) c)(0,1...

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  19. If the value of the determinant |(m,-2),(2,1)| is 7, then value of m i...

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  20. x and y are the dimensions of a rectangle and its perimeter is 64. Thi...

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  21. The value of determinant |(5,2),(7,4)| is…………..a)6 b)-6 c)34 d)-34

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