Question

Twice the sum of 9 and y is less than or equal to 5y

Answer 1

y
`\leq` -6.5

Explanation:

2(9+y)
`\leq` 5

(distribute)

18 + 2y
`\leq` 5

(isolate variable)

2y
`\leq` 5 - 18

(simplify)

2y
`\leq` -13

(isolate variable)

y
`\leq` -6.5