Question 1107012
Let {{{ a }}} = Jenny's age now
Let {{{ b }}} = her dad's age now
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(1) {{{ a = b - 28 }}}
(2) {{{ a + b = 60 }}}
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Plug (1) into (2)
(2) {{{ b - 28 + b = 60 }}}
(2) {{{ 2b = 88 }}}
(2) {{{ b = 44 }}}
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Dad is 44
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check:
(1) {{{ a = b - 28 }}}
(1) {{{ a = 44 - 28 }}}
(1) {{{ a = 16 }}}
and
(2) {{{ a + b = 60 }}}
(2) {{{ 16 + 44 = 60 }}}
(2) {{{ 60 = 60 }}}
OK