30=7x+-3x

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


Simplifying
30 = 7x + -3x

Combine like terms: 7x + -3x = 4x
30 = 4x

Solving
30 = 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
30 + -4x = 4x + -4x

Combine like terms: 4x + -4x = 0
30 + -4x = 0

Add '-30' to each side of the equation.
30 + -30 + -4x = 0 + -30

Combine like terms: 30 + -30 = 0
0 + -4x = 0 + -30
-4x = 0 + -30

Combine like terms: 0 + -30 = -30
-4x = -30

Divide each side by '-4'.
x = 7.5

Simplifying
x = 7.5

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