if a-b=3 and a+b=7 then what is the value of b?
Answers
Answered by
3
Answer:
Step by step explanation:-
a-b=3
a+b=7
Subtracting both,
a-a-b- b=3-7
-2b=-4
b =2
Answered by
1
Answer:
a=5
b=2
Step-by-step explanation:
use elimination method,
a-b=3
a+b=7 (2)
---------
2a+0=10
2a=10
a=5 (1)
Substitute (1) in (2)
5+b=7
b=2
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