SOLUTION: (1)solve for y in 3x+7y = 6x+1
(2)solve the system of equation: 2x+5y =2
-7x+4y =20
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Question 698569: (1)solve for y in 3x+7y = 6x+1
(2)solve the system of equation: 2x+5y =2
-7x+4y =20
Answer by sofiyac(983) (Show Source): You can put this solution on YOUR website!
One problem at a time please.
(1)solve for y in 3x+7y = 6x+1
3x+7y = 6x+1 subtract 3x from each side of the equal sign
7y=3x+1 divide each side by 7
(2)solve the system of equation:
2x+5y =2
-7x+4y =20
*************************************
2x+5y =2 multiply this equation by 7
-7x+4y =20 multiply this equation by 2
14x+35y=14
-14x+8y=40 now add the two equations
----------
43y=54 divide both sides by 43
now plug that into either of the original equations, i'll use first one, and solve for x
subtract 270/43 from each side
divide each side by 2
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