10-x=40

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Solution for 10-x=40 equation: 


Simplifying
10 + -1x = 40

Solving
10 + -1x = 40

Solving for variable 'x'.

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

Add '-10' to each side of the equation.
10 + -10 + -1x = 40 + -10

Combine like terms: 10 + -10 = 0
0 + -1x = 40 + -10
-1x = 40 + -10

Combine like terms: 40 + -10 = 30
-1x = 30

Divide each side by '-1'.
x = -30

Simplifying
x = -30

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