Question 756709
Let {{{ j }}} = Jason's age now
Let {{{ t }}} = Tim's age now
given:
(1) {{{ j = t + 5 }}}
(2) {{{ t - 2 = (3/4)*( j - 2 ) }}}
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(2) {{{ 4*( t - 2 ) = 3*( j - 2 ) }}}
(2) {{{ 4t - 8 = 3j - 6 }}}
(2) {{{ 4t - 3j = 2 }}}
and
(1) {{{ -t + j = 5 }}}
(1) {{{ -3t + 3j = 15 }}}
Add (1) and (2)
(2) {{{ 4t - 3j = 2 }}}
(1) {{{ -3t + 3j = 15 }}}
{{{ t = 17 }}}
{{{ t = 17 }}}
and
(1) {{{ j = t + 5 }}}
(1) {{{ j = 17 + 5 }}}
(1) {{{ j = 22 }}}
Jason is 22
Tim is 17 
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check:
(2) {{{ t - 2 = (3/4)*( j - 2 ) }}}
(2) {{{ 17 - 2 = (3/4)*( 22 - 2 ) }}}
(2) {{{ 15 = (3/4)*20 }}}
(2) {{{ 60 = 3*20 }}}
(2) {{{ 60 = 60 }}}
OK