What is the result of subtracting the second equation from the first? -2x+y = 0 -7x+3y = 2
1 answer:
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If it is 
=2c+9, go to AAAAAA
if it is (
)(4c+16)=2c+9, go to BBBBB
AAAAAAAAA
=2c+9
=2c+9
times 4c+16 to both sides
1=(2c+9)(4c+16)
distribute
1=8c^2+68c+144
minus 1 both sides
0=8c^2+68c+143
use quadratic formula
c=
or 
BBBBBBBBBBBB
(3/3)(4c+16)=2c+9
1(4c+16)=2c+9
4c+16=2c+9
minus 2c both sides
2c+16=9
minus 16 both sides
2c=-7
divide both sides by 2
c=-7/2
c=-3.5
if it is=2c+9,
c= or
if it is ()(4c+16)=2c+9, c=-3.5
if it is (
AAAAAAAAA
times 4c+16 to both sides
1=(2c+9)(4c+16)
distribute
1=8c^2+68c+144
minus 1 both sides
0=8c^2+68c+143
use quadratic formula
c=
BBBBBBBBBBBB
(3/3)(4c+16)=2c+9
1(4c+16)=2c+9
4c+16=2c+9
minus 2c both sides
2c+16=9
minus 16 both sides
2c=-7
divide both sides by 2
c=-7/2
c=-3.5
if it is
c=
if it is (
