-15=6(7-2x)+3(x-7)

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Solution for -15=6(7-2x)+3(x-7) equation:


Simplifying
-15 = 6(7 + -2x) + 3(x + -7)
-15 = (7 * 6 + -2x * 6) + 3(x + -7)
-15 = (42 + -12x) + 3(x + -7)

Reorder the terms:
-15 = 42 + -12x + 3(-7 + x)
-15 = 42 + -12x + (-7 * 3 + x * 3)
-15 = 42 + -12x + (-21 + 3x)

Reorder the terms:
-15 = 42 + -21 + -12x + 3x

Combine like terms: 42 + -21 = 21
-15 = 21 + -12x + 3x

Combine like terms: -12x + 3x = -9x
-15 = 21 + -9x

Solving
-15 = 21 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
-15 + 9x = 21 + -9x + 9x

Combine like terms: -9x + 9x = 0
-15 + 9x = 21 + 0
-15 + 9x = 21

Add '15' to each side of the equation.
-15 + 15 + 9x = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 9x = 21 + 15
9x = 21 + 15

Combine like terms: 21 + 15 = 36
9x = 36

Divide each side by '9'.
x = 4

Simplifying
x = 4

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