40-10-x=13

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Solution for 40-10-x=13 equation: 


Simplifying
40 + -10 + -1x = 13

Combine like terms: 40 + -10 = 30
30 + -1x = 13

Solving
30 + -1x = 13

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + -1x = 13 + -30

Combine like terms: 30 + -30 = 0
0 + -1x = 13 + -30
-1x = 13 + -30

Combine like terms: 13 + -30 = -17
-1x = -17

Divide each side by '-1'.
x = 17

Simplifying
x = 17

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