if 5a+3b=35 and a/b=2/5 , what is the value of a?
A 14/5
B 7/2
C 5
D 7
Answers
Answered by
0
Answer:
A
Step-by-step explanation:
a/b=2/5. 5a+3b=35......... (1)
a=2b/5..... (2)
put eq (2) in (1)
- 5 (2b/5)+3b=35
- 2b+3b=35
- 5b=35
- b=7
put b=7 in eq (2)
a=2 (7)/5
a=14/5
Answered by
1
Answer:a is the answer
Step-by-step explanation:froma/b=2/5
By cross multiplication method
5a=2b
b=5a/2 putting this in Eq.
5a+3b=35
5a+3(5a/2)=35
5a+15a/2=35
By LCM
25a=70
a=70/25
=14/5
HOPE IT MAY HELP YOU
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