(3x+1)+(4x-7)=85

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Solution for (3x+1)+(4x-7)=85 equation:


Simplifying
(3x + 1) + (4x + -7) = 85

Reorder the terms:
(1 + 3x) + (4x + -7) = 85

Remove parenthesis around (1 + 3x)
1 + 3x + (4x + -7) = 85

Reorder the terms:
1 + 3x + (-7 + 4x) = 85

Remove parenthesis around (-7 + 4x)
1 + 3x + -7 + 4x = 85

Reorder the terms:
1 + -7 + 3x + 4x = 85

Combine like terms: 1 + -7 = -6
-6 + 3x + 4x = 85

Combine like terms: 3x + 4x = 7x
-6 + 7x = 85

Solving
-6 + 7x = 85

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + 7x = 85 + 6

Combine like terms: -6 + 6 = 0
0 + 7x = 85 + 6
7x = 85 + 6

Combine like terms: 85 + 6 = 91
7x = 91

Divide each side by '7'.
x = 13

Simplifying
x = 13

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