mkenziem15 mkenziem15

09-11-2020
Mathematics

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solve each system of equations using substitution. a=5b+8 a=-10b-7

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vanessaakaraiwe123 vanessaakaraiwe123

09-11-2020

Answer:

a = 3, b = -1

Step-by-step explanation:

a = 5b + 8

a = -10b - 7

5b + 8 = -10b - 7

Add 10b from both sides;

15b + 8 = -7

Subtract 8 from both sides;

15b = -15

Divide both sides by 15;

b = -1

Lets substitute b;

a = 5b + 8

a = 5(-1) + 8

a = -5 + 8

a = 3

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