7x-81=3x-13

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Solution for 7x-81=3x-13 equation:


Simplifying
7x + -81 = 3x + -13

Reorder the terms:
-81 + 7x = 3x + -13

Reorder the terms:
-81 + 7x = -13 + 3x

Solving
-81 + 7x = -13 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-81 + 7x + -3x = -13 + 3x + -3x

Combine like terms: 7x + -3x = 4x
-81 + 4x = -13 + 3x + -3x

Combine like terms: 3x + -3x = 0
-81 + 4x = -13 + 0
-81 + 4x = -13

Add '81' to each side of the equation.
-81 + 81 + 4x = -13 + 81

Combine like terms: -81 + 81 = 0
0 + 4x = -13 + 81
4x = -13 + 81

Combine like terms: -13 + 81 = 68
4x = 68

Divide each side by '4'.
x = 17

Simplifying
x = 17

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