Question

The Value of x in the system of equation at the right is -2 what is the value of a? use elimination to help you find the value. ax + 4y = 6

2x - 4y = -16

Answer 1

2x-4y=-16
ax+4y=6 +
--------------------
2x+ax=-10; for x=-2,
2(-2)+a(-2)=-10
-2a=-10+4
a=-6/-2
a=3