(3x-1)+(7x+1)=90

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Solution for (3x-1)+(7x+1)=90 equation:


Simplifying
(3x + -1) + (7x + 1) = 90

Reorder the terms:
(-1 + 3x) + (7x + 1) = 90

Remove parenthesis around (-1 + 3x)
-1 + 3x + (7x + 1) = 90

Reorder the terms:
-1 + 3x + (1 + 7x) = 90

Remove parenthesis around (1 + 7x)
-1 + 3x + 1 + 7x = 90

Reorder the terms:
-1 + 1 + 3x + 7x = 90

Combine like terms: -1 + 1 = 0
0 + 3x + 7x = 90
3x + 7x = 90

Combine like terms: 3x + 7x = 10x
10x = 90

Solving
10x = 90

Solving for variable 'x'.

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

Divide each side by '10'.
x = 9

Simplifying
x = 9

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