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17-05-2019
Mathematics

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Use the substitution method to solve the system of equations

Use the substitution method to solve the system of equations class=

Respuesta :

shinkdiva shinkdiva

23-05-2019

Answer:

C. (5,-2)

Step-by-step explanation:

3x+7y=1

substitute x-7 for y

3x+7(x-7)=1

3x+7x-49=1

10x-49=1

10x= 50

x=5

now substitute x=5 in the other equation

y=5-7

y=-2

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