Question 157275
1) The answer's correct but you didn't use an inequality sign. 
{{{y<41/8}}}
In interval notation, you would signify all values less than 41/8.
The solution set is the interval,
({{{-infinity}}},{{{41/8}}})
The open right hand parentheses signified that 41/8 is not included in the solution. 
If it was, you would use the bracket ]. 
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2) {{{7x+16<=8}}}
{{{7x<=-8}}}
{{{x<=-8/7}}} 
The solution set is the interval,
({{{-infinity}}},{{{-8/7}}})
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3) {{{4x-16=y}}}
{{{4x=y+16}}}
{{{x=(y+16)/4}}}
The solution set is one point.