Answer:
x = (a^2 + c)/b
Step-by-step explanation:
a a−(a+b)x=(b−a)x−(c+bx)
<=> a^2 - ax - bx = bx - ax - c - bx
<=> a^2 - ax - bx - (bx - ax - c - bx) = 0
<=> a^2 - ax - bx - bx + ax + c + bx = 0
<=> a^2 - ax + ax - bx - bx + bx + c = 0
<=> a^2 - bx + c = 0
<=> a^2 + c = bx
=> x = (a^2 + c)/b
