Question

If((7y,5),(2x-3y,-3))=((-21,5),(11,-3)),find the value of x.

Answer 1

solution

by equating

7y =-21 ⇒y=-3

2x - 3y=11 ⇒ 2x -3(-3)=11

2x + 9=11 ⇒ 2x=11-9

⇒2x=2

⇒x=1