SOLUTION: x+y=4 x=-1

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Question 76198This question is from textbook algebra1
: x+y=4 x=-1 This question is from textbook algebra1

Answer by tutorcecilia(2152) About Me  (Show Source):
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x+y=4 x=-1
.
Substitute x=-1 for x in the first equation and solve
x+y=4
(-1)+y=4
-1+y=4
-1+1+y=4+1
y=5
.
Check by plugging-in the values for x and y and solve:
x+y=4
(-1)+5=4
4=4 [checks out]