Question

-a(3-a) +7x=4(x-2a+3) - a² При a= - 3

Answer 1

-3a+a^2+7x=4x-8a+12-a^2
2a^2+5a+3x=12
(a=-3)
2.9-5.3+3x=12
18-15+3x=12
3x=12-3
3x=9
X=9/3
X=3