Answer:
7/20 of laundry is still pending.
Explanation:
Now the both washed is,
→ (2/5) + (1/4)
→ ((2 × 4)/(5 × 4)) + ((1 × 5)/(4 × 5))
→ (8/20) + (5/20)
→ 13/20
Forming the equation,
→ (13/20) + x = 1
Then required value of x will be,
→ (13/20) + x = 1
→ x = 1 - (13/20)
→ x = (20/20) - (13/20)
→ x = (20 - 13)/20
→ [ x = 7/20 ]
Hence, 7/20 of laundry is pending.