Question 627188
Let {{{ a }}} = amount spent on streets
Let {{{ b }}} = amount spent on parks
Let {{{ c }}} = amount spent on urban renewal
given:
(1) {{{ a + b + c = 950000 }}}
(2) {{{ a = b }}}
(3) {{{ c = a + b }}}
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Substitute (3) into (1)
(1) {{{ a + b + c = 950000 }}}
(1) {{{ a + b + a + b = 950000 }}}
(1) {{{ 2a + 2b = 950000 }}}
Substitute (2) into (1)
(1) {{{ 2b + 2b = 950000 }}}
(1) {{{ 4b = 950000 }}}
(1) {{{ b = 237500 }}}
and, since
(2) {{{ a = b }}}
(2) {{{ a = 237500 }}}
and
(3) {{{ c = a + b }}}
(3) {{{ c = 2*237500 }}}
(3) {{{ c = 475000 }}}
$237,500 = amount spent on streets
$237,500 = amount spent on parks
$475,000 = amount spent on urban renewal
check answer:
(1) {{{ a + b + c = 950000 }}}
(1) {{{ 237500 + 237500 + 475000 = 950000 }}}
(1) {{{ 950000 = 950000 }}}
OK