Question 1020886
Let {{{ b }}} = Bill's age now
Let {{{ j }}} = Jane's age now
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(1) {{{ b = j + 29 }}}
(2) {{{ b + 15 = 2*( j + 15 ) }}}
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(2) {{{ b + 15 = 2j + 30 }}}
(2) {{{ b - 2j = 15 }}}
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(1) {{{ b - j = 29 }}}
Subtract (2) from (1)
(1) {{{ b - j = 29 }}}
(2) {{{ -b + 2j = -15 }}}
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{{{ j = 14 }}}
and
(1) {{{ b = j + 29 }}}
(1) {{{ b =14 + 29 }}}
(1) {{{ b = 43 }}}
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Bill is 43 now
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check:
(2) {{{ b + 15 = 2*( j + 15 ) }}}
(2) {{{ 43 + 15 = 2*(14 + 15 ) }}}
(2) {{{ 58 = 2*29 }}}
(2) {{{ 58 = 58 }}}