Subtract 3 first so it would be 7x=15
then divide by 7 so x would be approximately 2.14
Answer:
<h2>400</h2>
Step-by-step explanation:

Answer:
swimmer b swims 100 yards. approximately how many more feet did swimmer a swim than swimmer b? 2.
Step-by-step explanation:
The answer is 6.1 = 6 1/10
I added a screenshot with the complete question
Answer:x = 3
y = 9
Explanation:1- getting the value of x:We are given that:
side AB is congruent to side DF. This means that:
AB = DF
3(2x+10) = 12x + 12
6x + 30 = 12x + 12
12x - 6x = 30 - 12
6x = 18
x = 18/6
x = 3
2- getting the value of y:We are given that:
side BC is congruent to side FG. This means that:
BC = FG
2y + 12 = 2(2y-3)
2y + 12 = 4y - 6
4y - 2y = 12 + 6
2y = 18
y = 18/2
y = 9
Hope this helps :)