Question 990763
Let {{{ m }}} = Miguel's age now
Let {{{ g }}} = his grandfather's age now
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(1) {{{ g + 3 = 6*( m - 1 ) }}}
(2) {{{ m + g = 68 }}}
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(1) {{{ g + 3 = 6m - 6 }}}
(1) {{{ 6m - g = 9 }}}
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Add (1) and (2)
{{{ 7m = 77 }}}
{{{ m = 11 }}}
and
(2) {{{ 11 + g = 68 }}}
(2) {{{ g = 68 - 11 }}}
(2) {{{ g = 57 }}}
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Mioguel is 11 now
His grandfather is 57 now
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check:
(1) {{{ g + 3 = 6*( m - 1 ) }}}
(1) {{{ 57 + 3 = 6*( 11 - 1 ) }}}
(1) {{{ 60 = 6*10 }}}
(1) {{{ 60 = 60 }}}
OK