solve by Cramer's rule:
5x-7y=2
7x-5y=3
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Step-by-step explanation:
5x-7y=2
7x-5y=3
a1=5 b1= -7 c1 =2
a2=7 b2= -5 c2 =3
D= |a1b2-a2b1|
=|5×(-5)-7×(-7)|
=|-25+49|
=24
Dx=|c1b2-c2b1|
=|2×(-5)-3×(-7)|
=| -10+21 |
=11
Dy=|a1c2-a2c1|
=|5×3-7×2|
=|15-14|
=1
X=Dx/D
=11/24
Y=Dy/D
=1/24
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