please solve this question with solution if the answer will correct I will add it to the brainliest answer
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bryananishalex:
show the full question
but this is the full question
ok thx
which grade are you
7th
what about you?
7 grade
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(3a+b):(a+b)=9:5
(3a+b)/(a+b)=9/5 (by applying cross section)
5(3a+b)=9(a+b)
15a+5b=9a+9b
15a-9a=9b-5b
6a=4b
a/b=4/6
a/b=2/3
that is a:b=2:3
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