Factor 16x+40y I don't know how to do this

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

The cost to rent a moving truck is a flat fee of $25 plus $0.60 per mile. the equation c = 25 + 0.6m models the cost, c, in dollars for the number of miles, m, traveled in the truck. identify the independent and dependent variables. the is the independent variable. the is the dependent variable.