Question 691613
The problem tells me
(1) {{{ A = 4B }}}
(2) {{{ A + B = 3750 }}}
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Substitute (1) into (2)
(2) {{{ 4B + B = 3750 }}}
(2) {{{ 5B = 3750 }}}
(2) {{{ B = 750 }}}
and, since
(1) {{{ A = 4B }}}
(1) {{{ A = 4*750 }}}
(1) {{{ A = 3000 }}}
A's salary is Rs 3000
B's salary is Rs 750