7x-54+8x=90

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Solution for 7x-54+8x=90 equation:


Simplifying
7x + -54 + 8x = 90

Reorder the terms:
-54 + 7x + 8x = 90

Combine like terms: 7x + 8x = 15x
-54 + 15x = 90

Solving
-54 + 15x = 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 + 15x = 90 + 54

Combine like terms: -54 + 54 = 0
0 + 15x = 90 + 54
15x = 90 + 54

Combine like terms: 90 + 54 = 144
15x = 144

Divide each side by '15'.
x = 9.6

Simplifying
x = 9.6

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