if a + b = 7 and a - b = 3 find a and b
Answers
Answered by
2
Answer:
a+b=7
a-b=3
Step-by-step explanation:
if for example
assume a as 4and b as3
4+3=7
by same assuming
4-3=1
next assume a as 5 and b as 2
5+2=7
5-2=3
so a is 5and b is 3 ..
Answered by
2
Answer:
a=5 and b=2
Step-by-step explanation:
given, a+b =7
therefore a=7-b....(1)
ATQ,
a-b=3
(7-b)-b=3....(from 1)
7-b-b=3
7-2b=3
-2b=3-7
-2b= -4
b= -4/ -2
b =2.....(2)
from 2 we get the value of a
a-b =3
a-2 = 3
a = 3+2
a =2
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