9x+4+4x-5=90

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Solution for 9x+4+4x-5=90 equation:


Simplifying
9x + 4 + 4x + -5 = 90

Reorder the terms:
4 + -5 + 9x + 4x = 90

Combine like terms: 4 + -5 = -1
-1 + 9x + 4x = 90

Combine like terms: 9x + 4x = 13x
-1 + 13x = 90

Solving
-1 + 13x = 90

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 13x = 90 + 1

Combine like terms: -1 + 1 = 0
0 + 13x = 90 + 1
13x = 90 + 1

Combine like terms: 90 + 1 = 91
13x = 91

Divide each side by '13'.
x = 7

Simplifying
x = 7

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