ebydaqueen17
Pola wants 3 oz of a 20% solution. she has only 5% and 30% available. how many oz of each should she mix to get what she wants?



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Algebraic!
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x+y =3 oz
.05*x + .3*y = .2*3

ebydaqueen17
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could you please solve the equations..i dont know how to....

ebydaqueen17
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and why did u multiply .2 by 3

Algebraic!
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what class are you taking?

cwrw238
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Algebraic multiplied 0.2 by 3 because thats the amount of substance in 3 oz of solution
(0.2 = 20%)

ebydaqueen17
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math 130 intermediate algebra

Algebraic!
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should be no problem for you to solve. very simple substitution.

ebydaqueen17
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ok. thnks

ebydaqueen17
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when pppl give yu best responses yur smart score goes up huh?

Algebraic!
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yes.

ebydaqueen17
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i multiplied the top equation by .3 so that i could cancel out the y value and after i solved i got x= .21

Algebraic!
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solve for either x or y, your choice:
x+y =3
sub.s into:
.05*x + .3*y = .2*3