Question

I thought of a decimal number. After I had multiplied it by 2, then added 1.5 and then divided by 3, I got 3.5. What was the decimal number?

• A. 7.1
• B. 5.6
• C. 5.8
• D. 4.5

Answer 1

The correct option is D 4.5

Let the decimal number be $x.$

$\frac{x\times 2+1.5}{3}=3.5$

$2x+1.5=3.5\times 3$

$2x+1.5=10.5$

$2x=9$

$x=\frac{9}{2}$

$x=4.5$

Hence, correct option is D.