18=3(x-1)-(x-9)

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Solution for 18=3(x-1)-(x-9) equation:


Simplifying
18 = 3(x + -1) + -1(x + -9)

Reorder the terms:
18 = 3(-1 + x) + -1(x + -9)
18 = (-1 * 3 + x * 3) + -1(x + -9)
18 = (-3 + 3x) + -1(x + -9)

Reorder the terms:
18 = -3 + 3x + -1(-9 + x)
18 = -3 + 3x + (-9 * -1 + x * -1)
18 = -3 + 3x + (9 + -1x)

Reorder the terms:
18 = -3 + 9 + 3x + -1x

Combine like terms: -3 + 9 = 6
18 = 6 + 3x + -1x

Combine like terms: 3x + -1x = 2x
18 = 6 + 2x

Solving
18 = 6 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
18 + -2x = 6 + 2x + -2x

Combine like terms: 2x + -2x = 0
18 + -2x = 6 + 0
18 + -2x = 6

Add '-18' to each side of the equation.
18 + -18 + -2x = 6 + -18

Combine like terms: 18 + -18 = 0
0 + -2x = 6 + -18
-2x = 6 + -18

Combine like terms: 6 + -18 = -12
-2x = -12

Divide each side by '-2'.
x = 6

Simplifying
x = 6

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