The weight of sand in the mixture when the weight of the clay in the mixture is 6.25 pounds is 4.69 pounds.
The equation can be represented as follows:
3c = 4s
3c = 4s
where
Hence,
3c = 4s
4s = 3c
let's make s the subject of the formula, since, we want to find s when c = 6.25 pounds
s = 3 / 4 c
s = 3 / 4 × 6.25
s = 18.75 / 4
s = 4.6875
s = 4.69 pounds
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