0.12y+0.09(y+7000)=2100

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Solution for 0.12y+0.09(y+7000)=2100 equation: 


Simplifying
0.12y + 0.09(y + 7000) = 2100

Reorder the terms:
0.12y + 0.09(7000 + y) = 2100
0.12y + (7000 * 0.09 + y * 0.09) = 2100
0.12y + (630 + 0.09y) = 2100

Reorder the terms:
630 + 0.12y + 0.09y = 2100

Combine like terms: 0.12y + 0.09y = 0.21y
630 + 0.21y = 2100

Solving
630 + 0.21y = 2100

Solving for variable 'y'.

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

Add '-630' to each side of the equation.
630 + -630 + 0.21y = 2100 + -630

Combine like terms: 630 + -630 = 0
0 + 0.21y = 2100 + -630
0.21y = 2100 + -630

Combine like terms: 2100 + -630 = 1470
0.21y = 1470

Divide each side by '0.21'.
y = 7000

Simplifying
y = 7000

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