2x+42-3=81

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Solution for 2x+42-3=81 equation:


Simplifying
2x + 42 + -3 = 81

Reorder the terms:
42 + -3 + 2x = 81

Combine like terms: 42 + -3 = 39
39 + 2x = 81

Solving
39 + 2x = 81

Solving for variable 'x'.

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

Add '-39' to each side of the equation.
39 + -39 + 2x = 81 + -39

Combine like terms: 39 + -39 = 0
0 + 2x = 81 + -39
2x = 81 + -39

Combine like terms: 81 + -39 = 42
2x = 42

Divide each side by '2'.
x = 21

Simplifying
x = 21

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