X - 7 = }(x – 12)
please help me

What is the quotient of 42/3 divided by 4 1/5

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2