(3x+9)+(5x-10)=90

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Solution for (3x+9)+(5x-10)=90 equation:


Simplifying
(3x + 9) + (5x + -10) = 90

Reorder the terms:
(9 + 3x) + (5x + -10) = 90

Remove parenthesis around (9 + 3x)
9 + 3x + (5x + -10) = 90

Reorder the terms:
9 + 3x + (-10 + 5x) = 90

Remove parenthesis around (-10 + 5x)
9 + 3x + -10 + 5x = 90

Reorder the terms:
9 + -10 + 3x + 5x = 90

Combine like terms: 9 + -10 = -1
-1 + 3x + 5x = 90

Combine like terms: 3x + 5x = 8x
-1 + 8x = 90

Solving
-1 + 8x = 90

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 8x = 90 + 1

Combine like terms: -1 + 1 = 0
0 + 8x = 90 + 1
8x = 90 + 1

Combine like terms: 90 + 1 = 91
8x = 91

Divide each side by '8'.
x = 11.375

Simplifying
x = 11.375

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