0.2(x+60)+0.4x=21

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Solution for 0.2(x+60)+0.4x=21 equation: 


Simplifying
0.2(x + 60) + 0.4x = 21

Reorder the terms:
0.2(60 + x) + 0.4x = 21
(60 * 0.2 + x * 0.2) + 0.4x = 21
(12 + 0.2x) + 0.4x = 21

Combine like terms: 0.2x + 0.4x = 0.6x
12 + 0.6x = 21

Solving
12 + 0.6x = 21

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 0.6x = 21 + -12

Combine like terms: 12 + -12 = 0
0 + 0.6x = 21 + -12
0.6x = 21 + -12

Combine like terms: 21 + -12 = 9
0.6x = 9

Divide each side by '0.6'.
x = 15

Simplifying
x = 15

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