How would you solve this problem?

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asked Nov 24, 2018 37.2k views

1 Answer

Stephen Hosking · Answer 1 · 2018-11-29T10:54:49+0000

Subtract the two equations.
-y = -7
y = 7
Plug 7 back in to either equation and solve for x.
x + 3(7) = 18
x + 21 = 18
Subtract 21 from both sides
x = -3
(-3,7)
CHECK
-3 + 3(7) = 18
-3 + 4(7) = 25

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