kadinmorgan
kadinmorgan
17-05-2018
Mathematics
contestada
y=x-7
y=-2x+8
solve using substitution
Respuesta :
whatisgoingon
whatisgoingon
17-05-2018
y = x-7
+7 +7
x = y+7
- - - -
y=-2x+8
y=-2(y+7) +8
y= -2y - 14 +8
+2y +2y
3y = -6
/3 /3
y = -2
- - - -
x = y+ 7
x = -2 +7
x = 5
(5, -2)
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