Answer: x=1 , y=4
Step-by-step explanation:
5x+y =9 y=9-5x
10x - 7y = -18
10x-7(9-5x)=-18 y=9-5x
10x-63+35x=-18 y=9-5(1)
45x-63=-18 y=4
45x=-18+63
45x=45
x=1
Answer:
x=1, y=4
Explanation:
5x+y=9
10x-7y=-18
(Multiply top equation by -2)
-10x-2y=-18
(Add)
-9y=-36
(Divide -36 by -9)
y=4
(Substitute y(4) into the top equation)
5x+4=9
(Subtract 4)
5x=5
(Divide 5)
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