Write the word sentence as a equation and solve it.

The difference of 2.1 and twice a number p is negative 4.7

2.1-2p = - 4.7

they said the difference of 2.1 and twice a number p. which I'm assuming letter p, but anyway. difference means subtraction and twice mean multiplication so 2p

that's why we have 2.1-2p = - 4.7