Question

7x + 4y = -3
-7x - 5y = 9
How do I solve using elimination

Answer 1

X=3, y=-6

Explanation:

7x+4y=-3 equation 1

-7x-5y=9 equation 2

-y=6. Add above two equations

Y=-6

solve for x by inputting y value into either equation.

7x+4(-6)=-3

7x-24=-3

7x=21

x=3

check answer by inputting x and y values into either equation

-7x-5y=9

-7(3)-5(-6)=9

–21+30=9

9=9