MATHS Class 8|| Linear equation in one variable|| RS Agrawal Solution||Excerisise 8a important Q 14 and 15

The homogeneous system AX=0of n linear equation in n variables has (A) a unique solutions if |A|!=0 (B) infinitely many solution if |A|=0 (C) no solution (D) none of these

3x-2-7,3/2x+9=1/2, y/3+(y-2)/4=5 are linear equations in one variable, because the highest power of the variable in each equation in one whereas the equations 3x^2-2x+1=0, y^2-1=8 are not linear equations, because the highest power of the variable in each equation is not one. In this chapter, we shall study linear equations in one variable only.

Every point on the graph of a linear equation in two variables does not represent a solution of the linear equation.

Given the linear equation 2x+3y 8=0 , write another linear equation in two variables such that the geometrical representation of the pair so formed is:(i) intersecting lines (ii) parallel lines (iii) coincident lines

Given the linear equation 2x+3y-8=0 , write another linear equation in two variables such that the geometrical representation of the pair so formed is (i) intersecting lines (ii) Parallel lines (iii) coincident lines

Given the linear equation 2x+3y-8=0 , write another linear equation in two variables such that the geometrical representation of the pair so formed is: (i) intersecting lines (ii) parallel lines (iii) coincident lines

The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.(Take the cost of a notebook to be Rs x and that of a pen to be Rs y).

Class 10 ncert maths solution exercise 8.1 Qn o. 1