2(4х + 6) = 22 - 3(18 - 3x)
Distributing the multiplication over the addition, we get:
2*4x + 2*6 = 22 - 3*18 + 3*3x
8x + 12 = 22 - 54 + 9x
8x + 12 = -32 + 9x
8x is adding on the left, so it will subtract on the right. 32 is subtracting on the right, then it will add on the left.
12 + 32 = 9x - 8x
44 = x