3x-15+4x=139

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Solution for 3x-15+4x=139 equation:


Simplifying
3x + -15 + 4x = 139

Reorder the terms:
-15 + 3x + 4x = 139

Combine like terms: 3x + 4x = 7x
-15 + 7x = 139

Solving
-15 + 7x = 139

Solving for variable 'x'.

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

Add '15' to each side of the equation.
-15 + 15 + 7x = 139 + 15

Combine like terms: -15 + 15 = 0
0 + 7x = 139 + 15
7x = 139 + 15

Combine like terms: 139 + 15 = 154
7x = 154

Divide each side by '7'.
x = 22

Simplifying
x = 22

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