3x=x+90

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Solution for 3x=x+90 equation: 


Simplifying
3x = x + 90

Reorder the terms:
3x = 90 + x

Solving
3x = 90 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
3x + -1x = 90 + x + -1x

Combine like terms: 3x + -1x = 2x
2x = 90 + x + -1x

Combine like terms: x + -1x = 0
2x = 90 + 0
2x = 90

Divide each side by '2'.
x = 45

Simplifying
x = 45

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