90-x=3x+10

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Solution for 90-x=3x+10 equation:


Simplifying
90 + -1x = 3x + 10

Reorder the terms:
90 + -1x = 10 + 3x

Solving
90 + -1x = 10 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
90 + -1x + -3x = 10 + 3x + -3x

Combine like terms: -1x + -3x = -4x
90 + -4x = 10 + 3x + -3x

Combine like terms: 3x + -3x = 0
90 + -4x = 10 + 0
90 + -4x = 10

Add '-90' to each side of the equation.
90 + -90 + -4x = 10 + -90

Combine like terms: 90 + -90 = 0
0 + -4x = 10 + -90
-4x = 10 + -90

Combine like terms: 10 + -90 = -80
-4x = -80

Divide each side by '-4'.
x = 20

Simplifying
x = 20

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