elahsamanrique elahsamanrique

23-04-2020
Mathematics

contestada

(08.03)
Solve the system of equations and choose the correct answer from the list of options. (4 points)
x-y=7
y = 3x + 12

Respuesta :

princedavidanicet6 princedavidanicet6

23-04-2020

Answer:

rearrange them properly to get

x-y=7

-3x+y=12

( by elimination method)

x-y = 7

-3x+y=

(x+ –3x) + (–y+y) = (7+12)

-2x+0= 19

x= -9.5

from eqn(i)

x-y=7

-9.5 - y=7

-y=16.5

y= -16.5

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