Question 1152425
Let {{{ a }}} = the price of a shirt
Let {{{ b }}} = the price of pants
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(1) {{{ 2a + b = 55 }}}
(2) {{{ a + 2b = 68 }}}
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(2) {{{ a = -2b + 68 }}}
Plug this result back into (1)
(1) {{{ 2*( -2b + 68 ) + b = 55 }}}
(1) {{{ -4b + 136 + b = 55 }}}
(1) {{{ -3b = -81 }}}
(1) {{{ b = 27 }}}
and
(1) {{{ 2a + 27 = 55 }}}
(1) {{{ 2a = 28 }}}
(1) {{{ a = 14 }}}
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$14 = the price of a shirt
$27 = the price of pants
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check:
(1) {{{ 2a + b = 55 }}}
(1) {{{ 2*14 + 27 = 55 }}}
you can do (1) and (2)