Start off by combining like terms (your y's).
7y - 6y - 10 = 13
y - 10 = 13
Now you need to get y by itself so add 10 to both sides
y - 10 = 13
+10 +10
y = 23
Answer:
2/2 I'm not sure for that but its base on answer key
Pretty low, it’s exactly 0.175