What is the value of R, if 10(8 + 4R) ÷ (12 × 5) - 5 × 2³ = 6?

Correct option is D

​$$10(8 + 4R) \div (12 \times 5) - 5 \times 2^3 = 6$$

$$\frac{10(8 + 4R)}{60} \ - 5 \times 8 = 6$$

$$\frac{10(8 + 4R)}{60} \ - 40 = 6$$

$$\frac{10(8 + 4R)}{60} \ =46$$

$$\ 80+ 40R = 46 \times 60\\\ 40 R = 2680 \\ R = 67$$​​​​​​