A+b=20 1.5a+1.25b=28 what do a and b stand for

asked Feb 27, 2022 63.4k views

4 votes

A+b=20
1.5a+1.25b=28

what do a and b stand for

by Peco

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8 votes

A= 12 and B= 8
Because 1.5•12= 18 so then take 1.25•8= 10 then add 18+10 which equals 20 when added together

Audwin Oyong answered Feb 28, 2022

4.8k points

6 votes

a=20-b (1)
1.5a+1.25b=28 (2)
Sub 1 into 2
1.5(20-b)+1.25b=28
30-1.5b+1.25b=28
-0.25b=28-30
-0.25b=-2
b=-2/-0.25
b=8
—————-
a=20-8
a=12

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