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7. If x+y=7 and x-y= 3
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pls tell what we have to find?
its ok.
x+y= 7 and x-y =3
Answered by
0
Answer:
10
Step-by-step explanation:
it is the answer if we have to find the value of 'xy'
if not mention it clearly
x + y = 7 __1
x - y = 3 ___2
from 2 we can write x = 3+y__3
so by substituting x = 3+y in 1
we get,
3+2y = 7
2y= 4
y =2
substitute the y value in 2
x - 2 = 3
x = 5
then
xy= 2*5
xy = 10
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