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22-01-2016
Mathematics

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Solve the system of equations using the substitution method.

Solve the system of equations using the substitution method class=

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Аноним Аноним

22-01-2016

Multiply 3x +y =23 by -4

x+4y=4
-12x+(-4y)=-92

Add together

-11x = -88

x = 8

Plug x in to find y.

8 + 4y = 4

Subtract 8 from each sides

4y = -4

Divide by 4

y = -1

So the answer is x =8, y= -1

I hope that helps!

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