4 and 20 = black birds in a pie.
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p = 8. The calculation for this equation works out as follows: 4p - 12 = 20 4p = 20 + 12 4p = 32 p = 32 / 4 p = 8
PQR P=2 Q=4 R=5 2 x 4 x 5 = 40
you cant unless you know what the value of P equals
It is a linear equation in a single variable, p.
There are 4 farthings in a penny. These are units of money.