7x-40-30+3x=

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Solution for 7x-40-30+3x= equation:


Simplifying
7x + -40 + -30 + 3x = 0

Reorder the terms:
-40 + -30 + 7x + 3x = 0

Combine like terms: -40 + -30 = -70
-70 + 7x + 3x = 0

Combine like terms: 7x + 3x = 10x
-70 + 10x = 0

Solving
-70 + 10x = 0

Solving for variable 'x'.

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

Add '70' to each side of the equation.
-70 + 70 + 10x = 0 + 70

Combine like terms: -70 + 70 = 0
0 + 10x = 0 + 70
10x = 0 + 70

Combine like terms: 0 + 70 = 70
10x = 70

Divide each side by '10'.
x = 7

Simplifying
x = 7

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