Question 1030151
Let {{{ j }}} = Justin's age
Let {{{ m }}} = Megan's age
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(1) {{{ j = 12 }}}
(2) {{{ j = ( 1/2 )*m - 10 }}}
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(2) {{{ 12 = (1/2)*m - 10 }}}
(2) {{{ 22 = (1/2)*m }}}
Multiply both sides by {{{ 2 }}}
(2) {{{ m = 44  }}}
Megan is 44
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check:
(2) {{{ j = ( 1/2 )*m - 10 }}}
(2) {{{ 12 = ( 1/2 )*44 - 10 }}}
(2) {{{ 12 = 22 - 10 }}}
(2) {{{ 12 = 12 }}}
OK