(0.49) 4 x (0.343) 4 ÷ (0.2401) 4 = (70 ÷ 100) ? + 3
(0.49) 4 x (0.343) 4 ÷ (0.2401) 4 = (70 ÷ 100) ? + 3
Explanation
(0.7) ^? + 3 = (0.49 x 0.343/0.2401)^4
(0.7)^? + 3 = (0.7)^4
On comparing the exponents both sides, we get
? + 3 = 4
∴ ? = 4 - 3 = 1