Marc lost 2 the first week of his diet, over the next three weeks he lost 6 pounds gained 7 pounds and then lost 6 pounds what was the cha he in his weight over the four weeks

- 7 ; 7 pounds loss in weight.

Step-by-step explanation:

Given that :

Week weight loss/ gain

1 - 2

2 - 6

3 + 7

4 - 6

Loss in weight is denoted by a negative sign;

The change in weight is the net sum of weight loss over the 4 weeks period

(-2) + (-6) + (7) + (-6)

-2 - 6 + 7 - 6 =-7

Hence, there is a 7 pounds loss in weight over the 4 weeks period.

3

step-by-step explanation:

x/3-10=8

x/3=18

x=48