Question 988943
Let {{{ j }}} = number of books Jason has
Let {{{ b }}} = number of books Bill has
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given:
(1) {{{ j = 2b + 4 }}}
(2) {{{ j + b = 22 }}}
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Substitute (1) into (2)
(2) {{{ 2b + 4 + b = 22 }}}
(2) {{{ 3b = 18 }}}
(2) {{{ b = 6 }}}
and
(2) {{{ j + b = 22 }}}
(2) {{{ j + 6 = 22 }}}
(2) {{{ j = 16 }}}
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Jason has 16 books
Bill has 6 books
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check:
(1) {{{ j = 2b + 4 }}}
(1) {{{ 16 = 2*6 + 4 }}}
(1) {{{ 16 = 16 }}}
OK