7x+1+5x-7=90

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Solution for 7x+1+5x-7=90 equation:


Simplifying
7x + 1 + 5x + -7 = 90

Reorder the terms:
1 + -7 + 7x + 5x = 90

Combine like terms: 1 + -7 = -6
-6 + 7x + 5x = 90

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

Solving
-6 + 12x = 90

Solving for variable 'x'.

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

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

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

Combine like terms: 90 + 6 = 96
12x = 96

Divide each side by '12'.
x = 8

Simplifying
x = 8

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