Find x if x + y = 5, and x - y = 7
Answers
Answered by
2
Answer:
x = 6
and
y = -1
Step-by-step explanation:
Given ,
and
Adding equation (1) and (2) we have
Again , from equation (1)
Answered by
3
Answer:
x + y = 5
x - y = 7
- + -
_________-
0 +2y = -2
2y = -2
y = -2/2 = -1
now putting the value of y in any equation we get,
x + (-1) = 5
x-1= 5
x= 5+1
x = 6
Step-by-step explanation:
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