Three adult 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 simplify the equation before solving for the variable.
A. Divide 75 by 3
B. Combine like terms in parentheses.
C. Add 3 to 75
D. Distribute values over the variables.