Classroom Finding a Solution from a Giver.A Write the word statement as an equation.
Use x as the variable. Then find all solution of the equation from the set (0, 2, 4, 6, 8, 10).
Three times a number is subtracted from 21, giving 15. 21 —3x = 15 Substitute each of the given numbers. The solution is 2, because 21 — 3(2) = 15.