3x=12+x+3

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Solution for 3x=12+x+3 equation:


Simplifying
3x = 12 + x + 3

Reorder the terms:
3x = 12 + 3 + x

Combine like terms: 12 + 3 = 15
3x = 15 + x

Solving
3x = 15 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
3x + -1x = 15 + x + -1x

Combine like terms: 3x + -1x = 2x
2x = 15 + x + -1x

Combine like terms: x + -1x = 0
2x = 15 + 0
2x = 15

Divide each side by '2'.
x = 7.5

Simplifying
x = 7.5

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