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3 years ago

What would you multiply to make the y variable cross out? -5x + y = -3 3x - 8y = 24

Mathematics

2 answers:

s2008m [1.1K]3 years ago

6 0

Answer:

Step-by-step explanation:

-40x + 8y = -24

3x - 8y = 24

-37x = 0

x = 0

0 + y = -3

y = -3

(0, -3)

Hitman42 [59]3 years ago

3 0

Answer:

I will show you how to solve for x and y.

Step-by-step explanation:

-5x + y = -3

3x - 8y = 24

You can isolate y in the first equation, and substitute that into the second equation.

so to isolate y in -5x + y = -3, you would add 5x to both sides

this gives you y = 5x - 3

Then substitute this y into the equation below.

3x - 8(5x-3) = 24 <u> (this way, the y variable disappears)</u>

then distribute the 8 into the bracket

3x - 40x + 24 = 24

combine the variables

-37x + 24 = 24

isolate x by moving the constants to one side

-37x = 0

so x = 0

I am not sure if you want the rest, but here it is.

substitute x = 0 into one of the equations.

-5x + y = -3

-5(0) + y = -3

y = -3

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