3-x-(3+6x)=-(-3+x)+18+x

Solution for 3-x-(3+6x)=-(-3+x)+18+x equation:

Simplifying
3 + -1x + -1(3 + 6x) = -1(-3 + x) + 18 + x
3 + -1x + (3 * -1 + 6x * -1) = -1(-3 + x) + 18 + x
3 + -1x + (-3 + -6x) = -1(-3 + x) + 18 + x

Reorder the terms:
3 + -3 + -1x + -6x = -1(-3 + x) + 18 + x

Combine like terms: 3 + -3 = 0
0 + -1x + -6x = -1(-3 + x) + 18 + x
-1x + -6x = -1(-3 + x) + 18 + x

Combine like terms: -1x + -6x = -7x
-7x = -1(-3 + x) + 18 + x
-7x = (-3 * -1 + x * -1) + 18 + x
-7x = (3 + -1x) + 18 + x

Reorder the terms:
-7x = 3 + 18 + -1x + x

Combine like terms: 3 + 18 = 21
-7x = 21 + -1x + x

Combine like terms: -1x + x = 0
-7x = 21 + 0
-7x = 21

Solving
-7x = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '-7'.
x = -3

Simplifying
x = -3