7x+(x-4)=31+x

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Solution for 7x+(x-4)=31+x equation:


Simplifying
7x + (x + -4) = 31 + x

Reorder the terms:
7x + (-4 + x) = 31 + x

Remove parenthesis around (-4 + x)
7x + -4 + x = 31 + x

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

Combine like terms: 7x + x = 8x
-4 + 8x = 31 + x

Solving
-4 + 8x = 31 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-4 + 8x + -1x = 31 + x + -1x

Combine like terms: 8x + -1x = 7x
-4 + 7x = 31 + x + -1x

Combine like terms: x + -1x = 0
-4 + 7x = 31 + 0
-4 + 7x = 31

Add '4' to each side of the equation.
-4 + 4 + 7x = 31 + 4

Combine like terms: -4 + 4 = 0
0 + 7x = 31 + 4
7x = 31 + 4

Combine like terms: 31 + 4 = 35
7x = 35

Divide each side by '7'.
x = 5

Simplifying
x = 5

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