(7x-1)+(3x-9)=90

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Solution for (7x-1)+(3x-9)=90 equation:


Simplifying
(7x + -1) + (3x + -9) = 90

Reorder the terms:
(-1 + 7x) + (3x + -9) = 90

Remove parenthesis around (-1 + 7x)
-1 + 7x + (3x + -9) = 90

Reorder the terms:
-1 + 7x + (-9 + 3x) = 90

Remove parenthesis around (-9 + 3x)
-1 + 7x + -9 + 3x = 90

Reorder the terms:
-1 + -9 + 7x + 3x = 90

Combine like terms: -1 + -9 = -10
-10 + 7x + 3x = 90

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

Solving
-10 + 10x = 90

Solving for variable 'x'.

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

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

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

Combine like terms: 90 + 10 = 100
10x = 100

Divide each side by '10'.
x = 10

Simplifying
x = 10

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