15=5x-3(x+7)

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Solution for 15=5x-3(x+7) equation:


Simplifying
15 = 5x + -3(x + 7)

Reorder the terms:
15 = 5x + -3(7 + x)
15 = 5x + (7 * -3 + x * -3)
15 = 5x + (-21 + -3x)

Reorder the terms:
15 = -21 + 5x + -3x

Combine like terms: 5x + -3x = 2x
15 = -21 + 2x

Solving
15 = -21 + 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.
15 + -2x = -21 + 2x + -2x

Combine like terms: 2x + -2x = 0
15 + -2x = -21 + 0
15 + -2x = -21

Add '-15' to each side of the equation.
15 + -15 + -2x = -21 + -15

Combine like terms: 15 + -15 = 0
0 + -2x = -21 + -15
-2x = -21 + -15

Combine like terms: -21 + -15 = -36
-2x = -36

Divide each side by '-2'.
x = 18

Simplifying
x = 18

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