x+y=7,x-y=-1 solve the equation by using elimination method
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10
Answer:
Step-by-step explanation:
Given that x+y=7
x-y=-1
On adding equation 2 and 1 we get
2x=6
x=3
x+y=7
3+y=7
y=7-3
y=4
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Answered by
12
Answer:
x+y=7 -----------1
x-y=1 ------------2
by the eq 1
x+y=7
x=7-y --------3
putting the value of x in eq 2
x-y=1
7-y-y=1
7+2y=1
2y=1-7
2y=-6
y=-6/2
y=-3
putting the value of y in eq 3
x=7-y
x=7-(-3)
x=7+3
x=10
Therefore ,
x=10,y=-3
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