(3x-6)+(4x-9)=90

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Solution for (3x-6)+(4x-9)=90 equation:


Simplifying
(3x + -6) + (4x + -9) = 90

Reorder the terms:
(-6 + 3x) + (4x + -9) = 90

Remove parenthesis around (-6 + 3x)
-6 + 3x + (4x + -9) = 90

Reorder the terms:
-6 + 3x + (-9 + 4x) = 90

Remove parenthesis around (-9 + 4x)
-6 + 3x + -9 + 4x = 90

Reorder the terms:
-6 + -9 + 3x + 4x = 90

Combine like terms: -6 + -9 = -15
-15 + 3x + 4x = 90

Combine like terms: 3x + 4x = 7x
-15 + 7x = 90

Solving
-15 + 7x = 90

Solving for variable 'x'.

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

Add '15' to each side of the equation.
-15 + 15 + 7x = 90 + 15

Combine like terms: -15 + 15 = 0
0 + 7x = 90 + 15
7x = 90 + 15

Combine like terms: 90 + 15 = 105
7x = 105

Divide each side by '7'.
x = 15

Simplifying
x = 15

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