0.2y+0.4(40-y)=10

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Solution for 0.2y+0.4(40-y)=10 equation: 


Simplifying
0.2y + 0.4(40 + -1y) = 10
0.2y + (40 * 0.4 + -1y * 0.4) = 10
0.2y + (16 + -0.4y) = 10

Reorder the terms:
16 + 0.2y + -0.4y = 10

Combine like terms: 0.2y + -0.4y = -0.2y
16 + -0.2y = 10

Solving
16 + -0.2y = 10

Solving for variable 'y'.

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

Add '-16' to each side of the equation.
16 + -16 + -0.2y = 10 + -16

Combine like terms: 16 + -16 = 0
0 + -0.2y = 10 + -16
-0.2y = 10 + -16

Combine like terms: 10 + -16 = -6
-0.2y = -6

Divide each side by '-0.2'.
y = 30

Simplifying
y = 30

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