fordahood80
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Solve the system of equations by using substitution.


6r + 7s = –1

2r + 4s = –12





1) (–4, –8)

2) (–8, –4)

3) (–7, 8)

4) (8, –7)

Answer :

Answer:

r = 8 and

s = -7

Step-by-step explanation:

(2r + 4s = - 12)/2 =

r +2s = -6

r = -2s - 6

Substitution:

6 (-2s -6) + 7s = -1

-12s - 36 + 7s = -1

-5s = 36-1

s = 35/-5

s = -7

6r + 7(-7) = -1

6r - 49 = -1

6r = 49-1

r = 48/6

r = 8

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