3=(.12)(15+X)

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Solution for 3=(.12)(15+X) equation: 


Simplifying
3 = (0.12)(15 + X)
3 = (15 * 0.12 + X * 0.12)
3 = (1.8 + 0.12X)

Solving
3 = 1.8 + 0.12X

Solving for variable 'X'.

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

Add '-0.12X' to each side of the equation.
3 + -0.12X = 1.8 + 0.12X + -0.12X

Combine like terms: 0.12X + -0.12X = 0.00
3 + -0.12X = 1.8 + 0.00
3 + -0.12X = 1.8

Add '-3' to each side of the equation.
3 + -3 + -0.12X = 1.8 + -3

Combine like terms: 3 + -3 = 0
0 + -0.12X = 1.8 + -3
-0.12X = 1.8 + -3

Combine like terms: 1.8 + -3 = -1.2
-0.12X = -1.2

Divide each side by '-0.12'.
X = 10

Simplifying
X = 10

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