math_celebrity Administrator Staff member Jul 28, 2018 #1 If you triple me, subract 7, and add 4 you get 42. What number am i? Start with an unknown number, "x". Triple me 3x Subtract 7 3x - 7 Add 4 3x - 7 + 4 You get 42 3x - 7 + 4 = 42 Simplify: 3x - 3 = 42 Run this through our equation calculator: x = 15

If you triple me, subract 7, and add 4 you get 42. What number am i? Start with an unknown number, "x". Triple me 3x Subtract 7 3x - 7 Add 4 3x - 7 + 4 You get 42 3x - 7 + 4 = 42 Simplify: 3x - 3 = 42 Run this through our equation calculator: x = 15