B. Solve:
1. An item price at P3,600 has a 25% discount. Find the
discounted price.

2. John lives twice as far from school as Mona does. If
the total distance that John and Mona travel every
school day is 8.7 km, how far from school does John
live?

3. Find two consecutive integers whose sum is 143.
(hint: let x-the first integer, X+1-second integer)​