Question 572652
Call the number of papers they deliver
{{{ j }}}, {{{ d }}}, and {{{ r }}}
given:
(1) {{{ j = 2d }}}
(2) {{{ d = r + 100 }}}
(3) {{{ j + d + r = 500 }}}
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From(2)
{{{ r = d - 100 }}}
Substitute (1) and (2) into (3)
(3) {{{ 2d + d + d - 100 = 500 }}}
(3) {{{ 4d = 500 + 100 }}}
(3) {{{ d = 600/4 }}}
(3) {{{ d = 150 }}}
and, since
(1) {{{ j = 2d }}}
(1) {{{ j = 2*150 }}}
(1) {{{ j = 300 }}}
and
(2) {{{ r = d - 100 }}}
(2) {{{ r = 150 - 100 }}}
(2) {{{ r = 50 }}}
Jcobo delivers 300
Dahlia delivers 150
Rashid delivers 50