(3x+1)+(7x+4)=90

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Solution for (3x+1)+(7x+4)=90 equation:


Simplifying
(3x + 1) + (7x + 4) = 90

Reorder the terms:
(1 + 3x) + (7x + 4) = 90

Remove parenthesis around (1 + 3x)
1 + 3x + (7x + 4) = 90

Reorder the terms:
1 + 3x + (4 + 7x) = 90

Remove parenthesis around (4 + 7x)
1 + 3x + 4 + 7x = 90

Reorder the terms:
1 + 4 + 3x + 7x = 90

Combine like terms: 1 + 4 = 5
5 + 3x + 7x = 90

Combine like terms: 3x + 7x = 10x
5 + 10x = 90

Solving
5 + 10x = 90

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 10x = 90 + -5

Combine like terms: 5 + -5 = 0
0 + 10x = 90 + -5
10x = 90 + -5

Combine like terms: 90 + -5 = 85
10x = 85

Divide each side by '10'.
x = 8.5

Simplifying
x = 8.5

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