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31-01-2018
Mathematics

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Solve the system of equations using substitution.

2x+y=11
x-y=7

Respuesta :

meredith48034 meredith48034

02-02-2018

x = y + 7

2x + y = 11

2(y + 7) + y = 11

2y + 14 + y = 11

3y + 14 = 11

3y = -3

y = -1

x + 1 = 7

x = 6

(6, -1)

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