Question

Find the value of a if x = 2a – 1 and y = 4a + 6 satisfy the equation 2x + y = -12 .
full method

Answer 1

Answer:

x=2a-1

y=4a+6

2(2a-1)+4a+6=-12

4a-2+4a+6=-12

8a+4=-12

4(2a+1)=-12

2a+1=-3

2a=-4a

a=-2