15x+30=12x+42

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Solution for 15x+30=12x+42 equation:


Simplifying
15x + 30 = 12x + 42

Reorder the terms:
30 + 15x = 12x + 42

Reorder the terms:
30 + 15x = 42 + 12x

Solving
30 + 15x = 42 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
30 + 15x + -12x = 42 + 12x + -12x

Combine like terms: 15x + -12x = 3x
30 + 3x = 42 + 12x + -12x

Combine like terms: 12x + -12x = 0
30 + 3x = 42 + 0
30 + 3x = 42

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

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

Combine like terms: 42 + -30 = 12
3x = 12

Divide each side by '3'.
x = 4

Simplifying
x = 4

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