SOLUTION: y=2x+3 5y-7x=18

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Question 200207: y=2x+3
5y-7x=18
Answer by RAY100(1637) About Me  (Show Source):
You can put this solution on YOUR website!
(1) y = 2x +3
.
(2) 5y -7x =18
.
subst (1) in (2)
.
5(2x+3) -7x = 18
.
10x +15 -7x = 18
.
3x =3
.
x=1
.
subst in (1),, y=2(1) +3 =5
.
check
(1) (5) = 2(1) +3 =5,,,,ok
(2) 5(5)-7(1) = 18,,,ok