2x-4+5x+7=31

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Solution for 2x-4+5x+7=31 equation:


Simplifying
2x + -4 + 5x + 7 = 31

Reorder the terms:
-4 + 7 + 2x + 5x = 31

Combine like terms: -4 + 7 = 3
3 + 2x + 5x = 31

Combine like terms: 2x + 5x = 7x
3 + 7x = 31

Solving
3 + 7x = 31

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 7x = 31 + -3

Combine like terms: 3 + -3 = 0
0 + 7x = 31 + -3
7x = 31 + -3

Combine like terms: 31 + -3 = 28
7x = 28

Divide each side by '7'.
x = 4

Simplifying
x = 4

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