Question 536407
Let {{{a}}} = Anne's age now
Let {{{m}}} = Mary's age now
given:
(1) {{{ a = m + 2 }}}
(2) {{{ a - 1 = 3*( m - 1 ) }}}
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Substitute (1) into (2)
(2) {{{ m + 2 - 1 = 3m - 3 }}}
(2) {{{ m + 1 = 3m - 3 }}}
(2) {{{ 2m = 4 }}}
(2) {{{ m = 2 }}}
and, since
(1) {{{ a = m + 2 }}}
(1) {{{ a = 2 + 2 }}}
(1) {{{ a = 4 }}}
Anne is 4 now