12+x=.85(15+x)

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Solution for 12+x=.85(15+x) equation:


Simplifying
12 + x = 0.85(15 + x)
12 + x = (15 * 0.85 + x * 0.85)
12 + x = (12.75 + 0.85x)

Solving
12 + x = 12.75 + 0.85x

Solving for variable 'x'.

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

Add '-0.85x' to each side of the equation.
12 + x + -0.85x = 12.75 + 0.85x + -0.85x

Combine like terms: x + -0.85x = 0.15x
12 + 0.15x = 12.75 + 0.85x + -0.85x

Combine like terms: 0.85x + -0.85x = 0.00
12 + 0.15x = 12.75 + 0.00
12 + 0.15x = 12.75

Add '-12' to each side of the equation.
12 + -12 + 0.15x = 12.75 + -12

Combine like terms: 12 + -12 = 0
0 + 0.15x = 12.75 + -12
0.15x = 12.75 + -12

Combine like terms: 12.75 + -12 = 0.75
0.15x = 0.75

Divide each side by '0.15'.
x = 5

Simplifying
x = 5

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