Question 1150631
Let {{{ a }}} = Kofi's age now
Let {{{ b }}} = Ama's age now
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(1) {{{ a = 3b }}}
(2) {{{ a - 9 = 4*( b - 9 ) }}}
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(2) {{{ a - 9 = 4b - 36 }}}
Plug (1) into (2)
(2) {{{ 3b - 9 = 4b - 36 }}}
(2) {{{ b = 27 }}}
and
(1) {{{ a = 3b }}}
(1) {{{ a = 81 }}}
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Kofi is 81
Ama is 27
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