Question: A scientist has a 25% acid solution and a 46% acid solution. In order to complete an experiment, she needs a mixture of 140mL of

A scientist has a 25% acid solution and a 46% acid solution. In order to complete an experiment, she needs a mixture of 140mL of a 31% acid solution. If the mixture contains xmL of the 25% acid solution and ymL of the 46% acid solution, write an expression in terms of x for the volume of the 46% acid solution, y, that is needed to make the mixture. Do not include the concentrations of the solutions in the expression

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