90=5x+4+7x+2

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Solution for 90=5x+4+7x+2 equation:


Simplifying
90 = 5x + 4 + 7x + 2

Reorder the terms:
90 = 4 + 2 + 5x + 7x

Combine like terms: 4 + 2 = 6
90 = 6 + 5x + 7x

Combine like terms: 5x + 7x = 12x
90 = 6 + 12x

Solving
90 = 6 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
90 + -12x = 6 + 12x + -12x

Combine like terms: 12x + -12x = 0
90 + -12x = 6 + 0
90 + -12x = 6

Add '-90' to each side of the equation.
90 + -90 + -12x = 6 + -90

Combine like terms: 90 + -90 = 0
0 + -12x = 6 + -90
-12x = 6 + -90

Combine like terms: 6 + -90 = -84
-12x = -84

Divide each side by '-12'.
x = 7

Simplifying
x = 7

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