Find the value of X and Y: X+Y=4 , -X+Y=10
Answers
Answered by
1
Step-by-step explanation:
- x+y=4
- -x+y=10
- by elimination
Therefore 2y=14
hence y=7
and x= -3
Answered by
0
Step-by-step explanation:
let ,
x+y=4 .........(1)
-x+y=10.........(2)
using equation(1) we get
x+y=4
x=4-y
substituting the value of x in equation (2) we get
-x+y=10
=> -(4-y)+y=10
=> -4+y+y=10
=> -4+2y=10
=> 2y=10+4
=> 2y=14
=> y=14/2
=> y=7
now putting the value of y in equation (1) we get
x+y=4
x+7=4
x=4-7
x= -3
therefore x=-3 and y= 7
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