Question

solve 4x+3y=15, 3x-2y=7 by cross multiplication

Answer 1

Step-by-step explanation:

4x+3y=15

3x-2y=7

4x+3y=15 3x-2y=7

4x+3y=3x-2y=7-15

4x-3x+3y=-2y=-8

x+3y+2y=-8

x+5y=-8

5y=-8-x. 1

x=-8-5y. 2

5y=-8-x =x-8-5y

-8=-8

4(-24)+3(-24)=15

-96+(-72)=15

15=15

3(-24)-2(-24)=7

7=7

Answer 2

1- 4x+3y=15

= 4x/15 = 3y/x

= 45y = 4x

2- 3x-2y=7

= 3x/7 = 2y/x

= 14 = 3x