(15x-20)+(5x-10)=90

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Solution for (15x-20)+(5x-10)=90 equation:


Simplifying
(15x + -20) + (5x + -10) = 90

Reorder the terms:
(-20 + 15x) + (5x + -10) = 90

Remove parenthesis around (-20 + 15x)
-20 + 15x + (5x + -10) = 90

Reorder the terms:
-20 + 15x + (-10 + 5x) = 90

Remove parenthesis around (-10 + 5x)
-20 + 15x + -10 + 5x = 90

Reorder the terms:
-20 + -10 + 15x + 5x = 90

Combine like terms: -20 + -10 = -30
-30 + 15x + 5x = 90

Combine like terms: 15x + 5x = 20x
-30 + 20x = 90

Solving
-30 + 20x = 90

Solving for variable 'x'.

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

Add '30' to each side of the equation.
-30 + 30 + 20x = 90 + 30

Combine like terms: -30 + 30 = 0
0 + 20x = 90 + 30
20x = 90 + 30

Combine like terms: 90 + 30 = 120
20x = 120

Divide each side by '20'.
x = 6

Simplifying
x = 6

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