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If 0.5x+0.7y=0.74 and 0.3x+0.5y=0.5 then...

If `0.5x+0.7y=0.74` and `0.3x+0.5y=0.5` then

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The correct Answer is:
`x = 0.5, y = 0. 7 `
Multiply each of the given equations throughout by 10.
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RS AGGARWAL-LINEAR EQUATIONS IN TWO VARIABLES -Exercise 3B
  1. 2x + 3y + 1 = 0 , ( 7- 4x )/(3) = y

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  2. 0.4 x + 0.3 y = 1.7, 0.7 x - 0.2 y = 0.8

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  3. If 0.5x+0.7y=0.74 and 0.3x+0.5y=0.5 then

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  4. Solve the following system of equations: 7(y+3)-2(x+2)=14 ,\ \ \ \ ...

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  5. 6x + 5y = 7x + 3y + 1 = 2 ( x + 6y - 1 )

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  6. (x + y - 8) /( 2 ) = ( x + 2y - 14 ) /( 3) = ( 3x + y - 12)/( ...

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  7. ( 5)/(x) + 6y = 13, (3)/(x) + 4y = 7 ( x ne 0 )

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  8. x + ( 6) /( y ) = 6, 3x - ( 8)/( y) = 5 ( y ne 0 )

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  9. Solve the following system of equations: 2x-3/y=9,\ \ \ \ 3x+7/y=2,...

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  10. ( 3 ) /(x) - (1 ) /( y) + 9 = 0 , (2)/(x) + ( 3)/( y) = 5 ( ...

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  11. ( 9)/(x) - ( 4)/( y) = 8, ( 13)/(x) + ( 7)/(y) = 101 ( x ne 0...

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  12. ( 5)/(x)- ( 3) /( y ) = 1, ( 3) /( 2 x ) + ( 2) /( 3y ) = 5...

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  13. ( 1 ) /( 2x ) + (1 ) /( 3y ) = 2, (1) /( 3x ) + (1) /( 2y...

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  14. 4 x + 6y = 3 xy , 8x + 9 y = 5xy ( x ne 0 , y ne 0 )

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  15. x + y = 5 xy , 3x + 2y = 13 xy ( x ne 0, y ne 0 )

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  16. Solve the following system of equations: 5/(x+y)-2/(x-y)=-1,\ \ \ \...

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  17. Solve : (3)/(x + y ) + ( 2)/(x - y ) = 2 and (9)/(x + y ) - ...

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  18. ( 5 ) /( x+ 1 ) - (2)/(y - 1 ) = (1)/(2), (10)/(x + 1) + ( 2...

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  19. (44)/(x+y)+(30)/(x-y)=10 (55)/(x+y)+(40)/(x-y)=13

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  20. ( 10 )/( x+ y) + (2 ) /(x - y ) = 4, ( 15)/( x + y ) - ...

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