Answer:
36
Step-by-step explanation:
X + 1/4x + 1/5x = 58
20/20x + 5/20x + 4/20x = 58
29/20x = 58
x = 58 * 20/29
x = 1160/29 = 40 <== the original number
Answer:
80 cm as a fraction of 4 m is 
Step-by-step explanation:
To write the fraction of two different quantities you must put them in the same units
<u><em>Example:</em></u> To write 5 grams as a fraction of 1 kilogram
- Change the 1 kilogram to grams by multiplying it by 1000
- The fraction will be

- Reduce it to its simplest form by divide up and down by 5 to be

<em>Let us use the same way to solve the question</em>
∵ 1 meter = 100 centimeters
∴ 4 meters = 4 × 100 = 400 centimeters
→ Now put 80 centimeters as a numerator and 400 centimeters as
a denominator
∵ The fraction is 
→ Divide up and down by 80 to simplify it
∴ The fraction =
∵ 80 ÷ 80 = 1
∵ 400 ÷ 80 = 5
∴ The fraction in its simplest form = 
∴ 80 cm as a fraction of 4 m is 