7x+30=3x+42

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Solution for 7x+30=3x+42 equation:


Simplifying
7x + 30 = 3x + 42

Reorder the terms:
30 + 7x = 3x + 42

Reorder the terms:
30 + 7x = 42 + 3x

Solving
30 + 7x = 42 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
30 + 7x + -3x = 42 + 3x + -3x

Combine like terms: 7x + -3x = 4x
30 + 4x = 42 + 3x + -3x

Combine like terms: 3x + -3x = 0
30 + 4x = 42 + 0
30 + 4x = 42

Add '-30' to each side of the equation.
30 + -30 + 4x = 42 + -30

Combine like terms: 30 + -30 = 0
0 + 4x = 42 + -30
4x = 42 + -30

Combine like terms: 42 + -30 = 12
4x = 12

Divide each side by '4'.
x = 3

Simplifying
x = 3

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