.12y+.02(y+4000)=640

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Solution for .12y+.02(y+4000)=640 equation:


Simplifying
0.12y + 0.02(y + 4000) = 640

Reorder the terms:
0.12y + 0.02(4000 + y) = 640
0.12y + (4000 * 0.02 + y * 0.02) = 640
0.12y + (80 + 0.02y) = 640

Reorder the terms:
80 + 0.12y + 0.02y = 640

Combine like terms: 0.12y + 0.02y = 0.14y
80 + 0.14y = 640

Solving
80 + 0.14y = 640

Solving for variable 'y'.

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

Add '-80' to each side of the equation.
80 + -80 + 0.14y = 640 + -80

Combine like terms: 80 + -80 = 0
0 + 0.14y = 640 + -80
0.14y = 640 + -80

Combine like terms: 640 + -80 = 560
0.14y = 560

Divide each side by '0.14'.
y = 4000

Simplifying
y = 4000

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