.3(X+15)+0.4(X+25)=25

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Solution for .3(X+15)+0.4(X+25)=25 equation: 


Simplifying
0.3(X + 15) + 0.4(X + 25) = 25

Reorder the terms:
0.3(15 + X) + 0.4(X + 25) = 25
(15 * 0.3 + X * 0.3) + 0.4(X + 25) = 25
(4.5 + 0.3X) + 0.4(X + 25) = 25

Reorder the terms:
4.5 + 0.3X + 0.4(25 + X) = 25
4.5 + 0.3X + (25 * 0.4 + X * 0.4) = 25
4.5 + 0.3X + (10 + 0.4X) = 25

Reorder the terms:
4.5 + 10 + 0.3X + 0.4X = 25

Combine like terms: 4.5 + 10 = 14.5
14.5 + 0.3X + 0.4X = 25

Combine like terms: 0.3X + 0.4X = 0.7X
14.5 + 0.7X = 25

Solving
14.5 + 0.7X = 25

Solving for variable 'X'.

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

Add '-14.5' to each side of the equation.
14.5 + -14.5 + 0.7X = 25 + -14.5

Combine like terms: 14.5 + -14.5 = 0.0
0.0 + 0.7X = 25 + -14.5
0.7X = 25 + -14.5

Combine like terms: 25 + -14.5 = 10.5
0.7X = 10.5

Divide each side by '0.7'.
X = 15

Simplifying
X = 15

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