Question 1099663
Let {{{ a }}} = Adam's age now
Let {{{ b }}} = Steve's age now
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(1) {{{ a - 2 = 3*( b - 2 ) }}}
(2) {{{ a + 4 = b + 4 + 10 }}}
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(1) {{{ a - 2 = 3b - 6 }}}
(1) {{{ -a + 3b = 4 }}}
and
(2) {{{ a - b = 10 }}}
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Add (1) and (2)
{{{ 2b = 14 }}}
{{{ b = 7 }}}
and
(2) {{{ a - 7 = 10 }}}
(2) {{{ a = 17 }}}
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Adam is 17
Steve is 7 
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check:
(1) {{{ a - 2 = 3*( b - 2 ) }}}
(1) {{{ 17 - 2 = 3*( 7 - 2 ) }}}
(1) {{{ 15 = 3*5 }}}
(1) {{{ 15 = 15 }}}
OK 
You can check (2)