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01-03-2021
Mathematics

contestada

3x+y=-9
Y=5x+7
Solve the system of linear equations by substitution

Respuesta :

hookkick6969 hookkick6969

02-03-2021

Answer:

x=-2

Step-by-step explanation:

Substitute y=5x+7 into the equation 3x+y=-9

So you will have, 3x+5x+7=-9

3x+5x=8x

8x+7=-9

8x+7-7=-9-7

8x=-16

x=-2

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