Question 178297
Let {{{r}}}= number of packages delivered by Ralph's express
Let {{{s}}}= number of packages delivered by Speedy's
Let {{{q}}}= number of packages delivered by Sendquick
Given:
(1) {{{r + s + q = 45}}}
(2) {{{s = 3r}}}
(3) {{{r = q + 5}}}
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From (3):
{{{q = r - 5}}}
From (1):
{{{r + 3r + r - 5 = 45}}}
{{{5r - 5 = 45}}}
{{{5r = 50}}}
{{{r = 10}}}
from (2):
{{{s = 3*10}}}
{{{s = 30}}}
from (3):
{{{10 = q + 5}}}
{{{q = 5}}}
Speedy's delivered 30, Ralph's delivered 10, Sendquick delivered 5