0.3(x+100)+0.3x=39

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Solution for 0.3(x+100)+0.3x=39 equation: 


Simplifying
0.3(x + 100) + 0.3x = 39

Reorder the terms:
0.3(100 + x) + 0.3x = 39
(100 * 0.3 + x * 0.3) + 0.3x = 39
(30 + 0.3x) + 0.3x = 39

Combine like terms: 0.3x + 0.3x = 0.6x
30 + 0.6x = 39

Solving
30 + 0.6x = 39

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + 0.6x = 39 + -30

Combine like terms: 30 + -30 = 0
0 + 0.6x = 39 + -30
0.6x = 39 + -30

Combine like terms: 39 + -30 = 9
0.6x = 9

Divide each side by '0.6'.
x = 15

Simplifying
x = 15

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