(3x+15)+(4x+5)=90

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Solution for (3x+15)+(4x+5)=90 equation:


Simplifying
(3x + 15) + (4x + 5) = 90

Reorder the terms:
(15 + 3x) + (4x + 5) = 90

Remove parenthesis around (15 + 3x)
15 + 3x + (4x + 5) = 90

Reorder the terms:
15 + 3x + (5 + 4x) = 90

Remove parenthesis around (5 + 4x)
15 + 3x + 5 + 4x = 90

Reorder the terms:
15 + 5 + 3x + 4x = 90

Combine like terms: 15 + 5 = 20
20 + 3x + 4x = 90

Combine like terms: 3x + 4x = 7x
20 + 7x = 90

Solving
20 + 7x = 90

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + 7x = 90 + -20

Combine like terms: 20 + -20 = 0
0 + 7x = 90 + -20
7x = 90 + -20

Combine like terms: 90 + -20 = 70
7x = 70

Divide each side by '7'.
x = 10

Simplifying
x = 10

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