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17-09-2015
Mathematics

contestada

X = y -3
X + 3y = 13

What is the solution to the system of equations?

A) (1,4)
B) (4,1)
C) (7,4)
D) (2.5,5.5)

Respuesta :

17-09-2015

x = y - 3

x + 3y = 13

x + 3y = 13 (replace x with y-3)

y - 3 + 3y = 13

4y - 3 = 13

4y = 13 + 3

4y = 16

y = 16/4

y = 4

x = y - 3

x = 4 - 3

x = 1

The answer is A. (1,4)

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