Answer:
In 14 weeks
Step-by-step explanation:
pedro: 710-35w
Maria: 570-25w
710 -35 w = 570 -25w
(subtract 570 from each side)
140 - 35 w = -25w
(add 35w to each side)
140 Â Â Â Â Â Â 10w
----- Â = Â Â Â ------- Â Â Â Â w = 14weeks
10 Â Â Â Â Â Â Â 10