Question 1003212
{{{ 6p + 4s = 114 }}}
{{{ 9p + 7s = 175.5 }}}
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(1) {{{ 3p + 2s = 57 }}}
(2) {{{ 18p + 14s = 351 }}}
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Multiply both sides of (1) by {{{ 6 }}} and
subtract (1) from (2)
(2) {{{ 18p + 14s = 351 }}}
(1) {{{ -18p - 12s -342 }}}
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{{{ 2s = 9 }}}
{{{ s = 4.5 }}}
and
(1) {{{ 3p + 2*4.5 = 57 }}}
(1) {{{ 3p + 9 = 57 }}}
(1) {{{ 3p = 48 }}}
(1) {{{ p = 16 }}}
Pizzas are $16 ea
Sodas are $4.50 ea