HELP PL THIS IS URGENT

After 7d - 7 = 42 is simplified to 7d = 49, what is the second step to solve for the variable "d"?

Multiply both sides by 49

Divide both sides by 7

Multiply both sides by 7

Divide both sides by 49

Write a corresponding real world problem to represent 2x - 125=400

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.