If (5a + 2b) : (7a + 3b) = 9:13 find the value of a:b
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Answered by
5
Answer:
(5a+2b)/(7a+3b)=9/13
5a+2b=9. ---(1)
7a+3b=13. ---(2)
eqn (1) is multiply 3 - eqn (2) is multiply 2
15a+6b=27
(-)14a+6b=26
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a=1
a value sub in eqn (1)
5(1)+2b=9
2b=9-5
2b=4
b=2
Answered by
8
Answer:
the ratio must be 1:2 mate
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