3x-40=-1

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Solution for 3x-40=-1 equation: 


Simplifying
3x + -40 = -1

Reorder the terms:
-40 + 3x = -1

Solving
-40 + 3x = -1

Solving for variable 'x'.

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

Add '40' to each side of the equation.
-40 + 40 + 3x = -1 + 40

Combine like terms: -40 + 40 = 0
0 + 3x = -1 + 40
3x = -1 + 40

Combine like terms: -1 + 40 = 39
3x = 39

Divide each side by '3'.
x = 13

Simplifying
x = 13

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