12x-3=90+3(x-7)

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Solution for 12x-3=90+3(x-7) equation:


Simplifying
12x + -3 = 90 + 3(x + -7)

Reorder the terms:
-3 + 12x = 90 + 3(x + -7)

Reorder the terms:
-3 + 12x = 90 + 3(-7 + x)
-3 + 12x = 90 + (-7 * 3 + x * 3)
-3 + 12x = 90 + (-21 + 3x)

Combine like terms: 90 + -21 = 69
-3 + 12x = 69 + 3x

Solving
-3 + 12x = 69 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-3 + 12x + -3x = 69 + 3x + -3x

Combine like terms: 12x + -3x = 9x
-3 + 9x = 69 + 3x + -3x

Combine like terms: 3x + -3x = 0
-3 + 9x = 69 + 0
-3 + 9x = 69

Add '3' to each side of the equation.
-3 + 3 + 9x = 69 + 3

Combine like terms: -3 + 3 = 0
0 + 9x = 69 + 3
9x = 69 + 3

Combine like terms: 69 + 3 = 72
9x = 72

Divide each side by '9'.
x = 8

Simplifying
x = 8

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