0.09y+0.13(400-y)=0.21y

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Solution for 0.09y+0.13(400-y)=0.21y equation:


Simplifying
0.09y + 0.13(400 + -1y) = 0.21y
0.09y + (400 * 0.13 + -1y * 0.13) = 0.21y
0.09y + (52 + -0.13y) = 0.21y

Reorder the terms:
52 + 0.09y + -0.13y = 0.21y

Combine like terms: 0.09y + -0.13y = -0.04y
52 + -0.04y = 0.21y

Solving
52 + -0.04y = 0.21y

Solving for variable 'y'.

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

Add '-0.21y' to each side of the equation.
52 + -0.04y + -0.21y = 0.21y + -0.21y

Combine like terms: -0.04y + -0.21y = -0.25y
52 + -0.25y = 0.21y + -0.21y

Combine like terms: 0.21y + -0.21y = 0.00
52 + -0.25y = 0.00

Add '-52' to each side of the equation.
52 + -52 + -0.25y = 0.00 + -52

Combine like terms: 52 + -52 = 0
0 + -0.25y = 0.00 + -52
-0.25y = 0.00 + -52

Combine like terms: 0.00 + -52 = -52
-0.25y = -52

Divide each side by '-0.25'.
y = 208

Simplifying
y = 208

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