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Anika [276]
3 years ago
9

-7/9y - 4 = 2/3y + 9

Mathematics
1 answer:
finlep [7]3 years ago
4 0

For this case we must simplify the following equation:

- \frac {7} {9} y-4 = \frac {2} {3}y + 9

We subtract \frac {2} {3}yon both sides of the equation:

- \frac {7} {9} y- \frac {2} {3} y-4 = 9

Equal signs are added and the same sign is placed:

\frac {-21-18} {27}y-4 = 9\\\frac {-39} {27}y-4 = 9\\- \frac {13} {9}y-4 = 9

We add 4 to both sides of the equation:

- \frac {13} {9} y = 9 + 4\\- \frac {13} {9} y = 13

We multiply by 9 on both sides of the equation:

-13y = 117

We divide between 13 on both sides of the equation:

-y = \frac {117} {13}\\-y = 9

We multiply by -1 on both sides of the equation:

y = -9

ANswer:

y = -9

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D

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