90=7x+3(2x-9)

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Solution for 90=7x+3(2x-9) equation:


Simplifying
90 = 7x + 3(2x + -9)

Reorder the terms:
90 = 7x + 3(-9 + 2x)
90 = 7x + (-9 * 3 + 2x * 3)
90 = 7x + (-27 + 6x)

Reorder the terms:
90 = -27 + 7x + 6x

Combine like terms: 7x + 6x = 13x
90 = -27 + 13x

Solving
90 = -27 + 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
90 + -13x = -27 + 13x + -13x

Combine like terms: 13x + -13x = 0
90 + -13x = -27 + 0
90 + -13x = -27

Add '-90' to each side of the equation.
90 + -90 + -13x = -27 + -90

Combine like terms: 90 + -90 = 0
0 + -13x = -27 + -90
-13x = -27 + -90

Combine like terms: -27 + -90 = -117
-13x = -117

Divide each side by '-13'.
x = 9

Simplifying
x = 9

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