LucianaGarcia
LucianaGarcia
16-05-2016
Mathematics
contestada
y = 2x -7
x + 2y = 1
Respuesta :
apologiabiology
apologiabiology
16-05-2016
easy
y=2x-7
sub 2x-7 for every y you se inother equation
x+2(2x-7)=1
x+4x-14=1
5x-14=1
add 14 both sides
5x=15
divide 5
x=3
sub back
y=2x-7
y=2(3)-7
y=6-7
y=-1
(3,-1) is solution
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