0.3(x+5)+0.6(x+25)=21

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Solution for 0.3(x+5)+0.6(x+25)=21 equation: 


Simplifying
0.3(x + 5) + 0.6(x + 25) = 21

Reorder the terms:
0.3(5 + x) + 0.6(x + 25) = 21
(5 * 0.3 + x * 0.3) + 0.6(x + 25) = 21
(1.5 + 0.3x) + 0.6(x + 25) = 21

Reorder the terms:
1.5 + 0.3x + 0.6(25 + x) = 21
1.5 + 0.3x + (25 * 0.6 + x * 0.6) = 21
1.5 + 0.3x + (15 + 0.6x) = 21

Reorder the terms:
1.5 + 15 + 0.3x + 0.6x = 21

Combine like terms: 1.5 + 15 = 16.5
16.5 + 0.3x + 0.6x = 21

Combine like terms: 0.3x + 0.6x = 0.9x
16.5 + 0.9x = 21

Solving
16.5 + 0.9x = 21

Solving for variable 'x'.

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

Add '-16.5' to each side of the equation.
16.5 + -16.5 + 0.9x = 21 + -16.5

Combine like terms: 16.5 + -16.5 = 0.0
0.0 + 0.9x = 21 + -16.5
0.9x = 21 + -16.5

Combine like terms: 21 + -16.5 = 4.5
0.9x = 4.5

Divide each side by '0.9'.
x = 5

Simplifying
x = 5

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