One pound of candies costs $3.50.

1 answer:

6 0

Set it up as a proportion problem. $2.10 is to x pounds as $3.50 is to 1 pound

=$2.10/x pounds= $3.50/1 pound
Cross multiply
=($2.10 * 1)=($3.50 * x)
=2.10=3.50x
Divide both sides by 3.50
0.6= x
x= 0.6=6/10= 3/5

He can purchase 0.6 (or 3/5 in fraction terms) pounds for $2.10.

Hope this helps! :)

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Answer:

Step-by-step explanation:

So if x is the number, then 4 times the number would be 4x and adding that to -8 would be 4x + (-8) and then 12 times the number would be 12x, so you have 4x + (-8) = 12.

Then, solve:

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