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 this equation: 3 ( x + x - 3 ) = 75, were x represents the cost of an adult ticket. Identify the next step, which would 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