Answer:
x= 12.857
Step-by-step explanation:
80=5x + 2x -10 combine like terms
80= 7x -10 distributed 10 to both sides
90 =7x divide both sides by 7
12.857 =x
x = 12 6/7 or 90/7
5x + 2x - 10 = 80
^^add you like terms (5x + 2x)
7x - 10 = 80
add -10 to both sides so it cancels out
7x = 90
divide 7 from both sides to get x by itself
x = 12 6/7
Answer: 50%
Step-by-step explanation: Good luck! :D
