Given: b=3/4a a+b=21 Find a and b

beljuA

beljuA

Answered question

2021-01-05

Given:
b=34a
a+b=21
Find a and b

Answer & Explanation

smallq9

smallq9

Skilled2021-01-06Added 106 answers

Find a first. Substitute the first given equation into the second.
a+34a=21
74a=21
a=2174
a=12
Substitute the new found a into the first equation to find b.
b=34a
b=34×12
b=8

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