- Let the smartphone = S, the console = C, the wired controller = W, and the handheld device = H.
- From the second equation: S = W.
- Substitute S for W in the first equation: S + C + S = 23 → 2S + C = 23. (Equation A)
- Third equation: H - C = 13 → H = C + 13. (Equation B)
- Fourth equation: C + H = 27. Substitute Equation B into this: C + (C + 13) = 27 → 2C + 13 = 27 → 2C = 14 → C = 7.
- From Equation A: 2S + 7 = 23 → 2S = 16 → S = 8. So W = 8.
- From Equation B: H = 7 + 13 = 20.
- Final equation: S + C + W + H = 8 + 7 + 8 + 20 = 43.
43
Parent Tip: Review the logic above to help your child master the concept of 5th grade math puzzle worksheet.