4x-1=90-9x

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Solution for 4x-1=90-9x equation:


Simplifying
4x + -1 = 90 + -9x

Reorder the terms:
-1 + 4x = 90 + -9x

Solving
-1 + 4x = 90 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
-1 + 4x + 9x = 90 + -9x + 9x

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

Combine like terms: -9x + 9x = 0
-1 + 13x = 90 + 0
-1 + 13x = 90

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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