Question 1136848
Let {{{ a }}} = ounces of 1.5% solution needed
Let {{{ b }}} = ounces of water needed
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(1) {{{ a + b + 3 = 15 }}}
(2) {{{ ( .015a + .1*3 ) / 15 = .03 }}}
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(2) {{{ .015a + .3 = .45 }}}
(2) {{{ .015a = .15 }}}
(2) {{{ a = 10 }}}
and
(1) {{{ 10 + b + 3 = 15 }}}
(1) {{{ b = 2 }}}
10 ounces of 1.5% solution is needed
2 ounces of water is needed
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check:
(2) {{{ ( .015a + .1*3 ) / 15 = .03 }}}
(2) {{{ ( .015*10 + .3 ) / 15 = .03 }}}
(2) {{{ .45/15 = .03 }}}
(2) {{{ .45 = .45 }}}
OK