Question 529790
(1) {{{ 7x + 6y = 30 }}}
(2) {{{ 9x - 8y = 15 }}}
Multiply both sides of (1) by
{{{4}}}. Multiply both sides of (2) by
{{{3}}}. Then add (1) and (2).
(1) {{{ 28x + 24y = 120 }}}
(2) {{{ 27x - 24y = 45 }}}
{{{ 55x = 165 }}}
{{{ x = 3 }}}
Plug this back into (1) or (2)
(2) {{{ 9*3 - 8y=15 }}}
(2) {{{ 27 - 8y = 15 }}}
(2) {{{ 8y = 27 - 15 }}}
(2) {{{ 8y = 12 }}}
(2) {{{ y = 3/2 }}}
(3,3/2) answer