.40x+12=15+.30x

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Solution for .40x+12=15+.30x equation:


Simplifying
0.40x + 12 = 15 + 0.30x

Reorder the terms:
12 + 0.40x = 15 + 0.30x

Solving
12 + 0.40x = 15 + 0.30x

Solving for variable 'x'.

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

Add '-0.30x' to each side of the equation.
12 + 0.40x + -0.30x = 15 + 0.30x + -0.30x

Combine like terms: 0.40x + -0.30x = 0.1x
12 + 0.1x = 15 + 0.30x + -0.30x

Combine like terms: 0.30x + -0.30x = 0.00
12 + 0.1x = 15 + 0.00
12 + 0.1x = 15

Add '-12' to each side of the equation.
12 + -12 + 0.1x = 15 + -12

Combine like terms: 12 + -12 = 0
0 + 0.1x = 15 + -12
0.1x = 15 + -12

Combine like terms: 15 + -12 = 3
0.1x = 3

Divide each side by '0.1'.
x = 30

Simplifying
x = 30

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