-0.10(129)+0.90x=0.05(x-20)

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Solution for -0.10(129)+0.90x=0.05(x-20) equation: 


Simplifying
-0.10(129) + 0.90x = 0.05(x + -20)

Multiply -0.10 * 129
-12.9 + 0.90x = 0.05(x + -20)

Reorder the terms:
-12.9 + 0.90x = 0.05(-20 + x)
-12.9 + 0.90x = (-20 * 0.05 + x * 0.05)
-12.9 + 0.90x = (-1 + 0.05x)

Solving
-12.9 + 0.90x = -1 + 0.05x

Solving for variable 'x'.

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

Add '-0.05x' to each side of the equation.
-12.9 + 0.90x + -0.05x = -1 + 0.05x + -0.05x

Combine like terms: 0.90x + -0.05x = 0.85x
-12.9 + 0.85x = -1 + 0.05x + -0.05x

Combine like terms: 0.05x + -0.05x = 0.00
-12.9 + 0.85x = -1 + 0.00
-12.9 + 0.85x = -1

Add '12.9' to each side of the equation.
-12.9 + 12.9 + 0.85x = -1 + 12.9

Combine like terms: -12.9 + 12.9 = 0.0
0.0 + 0.85x = -1 + 12.9
0.85x = -1 + 12.9

Combine like terms: -1 + 12.9 = 11.9
0.85x = 11.9

Divide each side by '0.85'.
x = 14

Simplifying
x = 14

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