Solve each equation by elimination

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18