thatch86 thatch86

12-08-2020
Mathematics

contestada

12. Solve the systems of linear equations using the substitution method.
x=y - 2
4y = x + 23

Respuesta :

ericokwesi ericokwesi

12-08-2020

Answer:

x=5 and y=7

Step-by-step explanation:

x + 2 = y (equation 1)

x + 23 = 4y (equation 2)

(equation 2) - (equation 1)

This gives,21 = 3y

y = 21/3

y = 7.

Put y = 7 into equation 1 to find x

x + 2 = 7

x = 7 - 2

x = 5.

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