Question 179297
let number of packages speedy,ralphs,and sendquik delivered be a,b,and c respectively
:
a=2b.......eq 1
b=c+1......eq 2
a+b+c=7....eq 3
:
rewrite eq 2 to c=b-1 and take that value and the value of a in eq 1 and plug them into eq 3
:
(2b)+b+(b-1)=7
:
4b=8
:
{{{highlight(b=2)}}}packages delivered by ralphs
:
{{{highlight(a=2b=2(2)=4)}}}packages delivered by speedy
:
{{{highlight(c=b-1=2-1=1)}}}package delivered by sendquick