Question

x = 7, y = 3 is a solution of which of the following?

• A. x + y = 4
• B. x + 3y = 16
• C. x - y + 4 = 0
• D. x + y = 7

Answer 1

The correct option is B

x + 3y = 16

The solution of a linear equation should satisfy the equation.

Substitute the value of x and y in the given equations.

$7+3=10\ne 4;x=7,y=3$ is not a solution for x + y = 4 .

7+ 3(3) = 16; x = 7, y = 3 is a solution for x+ 3y =16

$7-3+4=8\ne 0;x=7,y=3$ is not a solution for x - y + 4 =0

$7+3=10\ne 7;x=7,y=3$ is not a solution for x - y + 4 =0