7x-2x-30=30

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Solution for 7x-2x-30=30 equation:


Simplifying
7x + -2x + -30 = 30

Reorder the terms:
-30 + 7x + -2x = 30

Combine like terms: 7x + -2x = 5x
-30 + 5x = 30

Solving
-30 + 5x = 30

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 + 5x = 30 + 30

Combine like terms: -30 + 30 = 0
0 + 5x = 30 + 30
5x = 30 + 30

Combine like terms: 30 + 30 = 60
5x = 60

Divide each side by '5'.
x = 12

Simplifying
x = 12

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