SOLUTION: 5x -9y =7 7y � 3x = -5 solve by substitution

Question 548944: 5x -9y =7
7y � 3x = -5
solve by substitution

Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
5x-9y=7 .............1
7y=-5+3x ---------2
/7=
y=-0.71+0.43x
Substitute y in (1)
5x-9(-0.71+0.43 x)=7
5x+6.43-3.86x= 7
5x-3.86 x=7-6.43
1.14x=0.57
/1.14
x=0.5
Plug the value of x in (1)
5x-9y= 7
5*0.5-9y=7
2.5-9y= 7
-9y=4.5
/ -9
y= -0.5
m.ananth@hotmail.ca

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