Belinda started exercising 4 weeks ago. Since she started exercising, she had lost 1 1/2 kg a week. If Belinda was 120 pounds two weeks ago, how much does Belinda now weight?

This is the concept of arithmetic; the weight of the Belinda now will be as follows;

amount of weight lost in 2 weeks will be:

2 * (1 1/2) = 3 kgs

The weight of Belinda now will be:

[weight 2 weeks ago]-[weight lost in 2 weeks]

=120-3

=117 kgs