90=3x+39+6x+15

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Solution for 90=3x+39+6x+15 equation:


Simplifying
90 = 3x + 39 + 6x + 15

Reorder the terms:
90 = 39 + 15 + 3x + 6x

Combine like terms: 39 + 15 = 54
90 = 54 + 3x + 6x

Combine like terms: 3x + 6x = 9x
90 = 54 + 9x

Solving
90 = 54 + 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.
90 + -9x = 54 + 9x + -9x

Combine like terms: 9x + -9x = 0
90 + -9x = 54 + 0
90 + -9x = 54

Add '-90' to each side of the equation.
90 + -90 + -9x = 54 + -90

Combine like terms: 90 + -90 = 0
0 + -9x = 54 + -90
-9x = 54 + -90

Combine like terms: 54 + -90 = -36
-9x = -36

Divide each side by '-9'.
x = 4

Simplifying
x = 4

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