Question 1130991
Let {{{ a }}} = liters of 70% mixture needed
Let {{{ b }}} = liters of water needed
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(1) {{{ a + b = 5 }}} liters
(2) {{{ .7a / 5 = .28 }}}
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(2) {{{ .7a = 1.4 }}}
(2) {{{ a = 2 }}} liters
and
(1) {{{ 2 + b = 5 }}}
(1) {{{ b = 3 }}} liters
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3,000 ml of water and 2,000 ml of 70% mixture are needed