Question 1095041
Let {{{ a }}} = man's age 
Let {{{ b }}} = son's age
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(1) {{{ a = b + 26 }}}
(2) {{{ a = 3b + 8 }}}
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Set (1) = (2)
{{{ b + 26 = 3b + 8 }}}
{{{ 2b = 18 }}}
{{{ b = 9 }}}
and
(1) {{{ a = b + 26 }}}
(1) {{{ a = 9 + 26 }}}
(1) {{{ a = 35 }}}
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The man is 35
The son is 9
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check:
(2) {{{ a = 3b + 8 }}}
(2) {{{ 35 = 3*9 + 8 }}}
(2) {{{ 35 = 27 + 8 }}}
(2) {{{ 35 = 35 }}}
OK