Question 712031
Let {{{ a }}} = your age now
Let {{{ b }}} = your Daughter's age now
{{{ a - 7 }}} = your age 7 years ago
{{{ b - 7 }}} = your Daughter's age 7 years ago
-------------
given:
(1) {{{ a - 7 = 11*( b - 7 ) }}}
(2) {{{ a = 4b }}}
-------------
(1) {{{ a - 7 = 11b - 77 }}}
Substitute (2) into (1)
(1) {{{ 4b - 7 = 11b - 77 }}}
(1) {{{ 7b = 77 - 7 }}}
(1) {{{ 7b = 70 }}}
(1) {{{ b = 10 }}}
and, since
(2) {{{ a = 4b }}}
(2) {{{ a = 4*10 }}}
(2) {{{ a = 40 }}}
You are 40 and your Daughter is 10 
check answer:
(1) {{{ a - 7 = 11*( b - 7 ) }}}
(1) {{{ 40 - 7 = 11*( 10 - 7 ) }}}
(1) {{{ 33 = 11*3 }}}
(1) {{{ 33 = 33 }}}
OK