I have memorized facts about fractions like these, so can tell you ...

_____
A fraction with 9 as a denominator is a repeating 1-digit decimal with the decimal digit being the numerator of the fraction.
A fraction with 11 as a denominator is a repeating 2-digit decimal with the two digits being 9 times the numerator of the fraction.
1/8 = 0.125, so any multiple of 1/8 is that multiple of 0.125.
Answer:
Y=15-5/6x
Step-by-step explanation:
Ax+By=C
A=5,
B=6,
C=90,
So, put in the numbers to variables:
5x+6y=90.
6y=90-5x
y=15-5/6x
Look it up........Hope i helped