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 + -9 + 7x + -3x = 90

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

Combine like terms: 7x + -3x = 4x
-10 + 4x = 90

Solving
-10 + 4x = 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 + 4x = 90 + 10

Combine like terms: -10 + 10 = 0
0 + 4x = 90 + 10
4x = 90 + 10

Combine like terms: 90 + 10 = 100
4x = 100

Divide each side by '4'.
x = 25

Simplifying
x = 25

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