3x+39+6x+15=90

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


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

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

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

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

Solving
54 + 9x = 90

Solving for variable 'x'.

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

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

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

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

Divide each side by '9'.
x = 4

Simplifying
x = 4

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