75-x-15=40

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Solution for 75-x-15=40 equation:


Simplifying
75 + -1x + -15 = 40

Reorder the terms:
75 + -15 + -1x = 40

Combine like terms: 75 + -15 = 60
60 + -1x = 40

Solving
60 + -1x = 40

Solving for variable 'x'.

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

Add '-60' to each side of the equation.
60 + -60 + -1x = 40 + -60

Combine like terms: 60 + -60 = 0
0 + -1x = 40 + -60
-1x = 40 + -60

Combine like terms: 40 + -60 = -20
-1x = -20

Divide each side by '-1'.
x = 20

Simplifying
x = 20

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