90=40-10x

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Solution for 90=40-10x equation:


Simplifying
90 = 40 + -10x

Solving
90 = 40 + -10x

Solving for variable 'x'.

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

Add '10x' to each side of the equation.
90 + 10x = 40 + -10x + 10x

Combine like terms: -10x + 10x = 0
90 + 10x = 40 + 0
90 + 10x = 40

Add '-90' to each side of the equation.
90 + -90 + 10x = 40 + -90

Combine like terms: 90 + -90 = 0
0 + 10x = 40 + -90
10x = 40 + -90

Combine like terms: 40 + -90 = -50
10x = -50

Divide each side by '10'.
x = -5

Simplifying
x = -5

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