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saveliy_v [14]
2 years ago
8

-3x-4y=-2 and y=2x-5. What is y? *

Mathematics
1 answer:
givi [52]2 years ago
4 0

Answer:

Step-by-step explanation:

The easiest way to do this is to solve for x first, then y.

Plug the second equation (y = 2x - 5) into the first equation (-3x - 4y = -2).  This will give you -3x - 4(2x - 5) = -2.  Solve for x.

-3x - 4(2x - 5) = -2

-3x - 8x + 20 = -2

-11x = -22

x = 2

Now, you can plug in the x-value into the second equation.

y = 2(2) - 5

y = 4 - 5

y = -1

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