0.12y+0.09(y+5000)=1290

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Solution for 0.12y+0.09(y+5000)=1290 equation:


Simplifying
0.12y + 0.09(y + 5000) = 1290

Reorder the terms:
0.12y + 0.09(5000 + y) = 1290
0.12y + (5000 * 0.09 + y * 0.09) = 1290
0.12y + (450 + 0.09y) = 1290

Reorder the terms:
450 + 0.12y + 0.09y = 1290

Combine like terms: 0.12y + 0.09y = 0.21y
450 + 0.21y = 1290

Solving
450 + 0.21y = 1290

Solving for variable 'y'.

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

Add '-450' to each side of the equation.
450 + -450 + 0.21y = 1290 + -450

Combine like terms: 450 + -450 = 0
0 + 0.21y = 1290 + -450
0.21y = 1290 + -450

Combine like terms: 1290 + -450 = 840
0.21y = 840

Divide each side by '0.21'.
y = 4000

Simplifying
y = 4000

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