Three adults and three child movie tickets were purchased for 75. The cost of each child ticket is 3 less than the cost of an adult ticket. The first step to solving this problem algebraically is to write an equation:3(x+x-3)=75, where x represents the cost of an adult ticket. Identify the next step, which would simplify the equation before solving for the variable

Combine like terms in parentheses
Divide 75 by 3
Add 3 to 75
Distribute values over the variables

The next step to simplify the equation before solving for the variable is to distribute the values over the variables.