3x-6+7=40

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Solution for 3x-6+7=40 equation: 


Simplifying
3x + -6 + 7 = 40

Reorder the terms:
-6 + 7 + 3x = 40

Combine like terms: -6 + 7 = 1
1 + 3x = 40

Solving
1 + 3x = 40

Solving for variable 'x'.

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

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

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

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

Divide each side by '3'.
x = 13

Simplifying
x = 13

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