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5n + 4

The number 5 is the numerical coefficient of n is the variable and 4 is constant.

-7x + 12

The number -7 is the numerical coefficient of the variable x. Note that negative sign on 7 is the part of the coefficient. The term 12 is a constant.

p + 3

The variable p is assumed to have a numerical coefficient of 1. The term 3 is a constant.

Sorry if this is all i got coz it is much simpler if its okay include also the numerical coefficient.

Hope this would help you... ^__^

2 4 2