It is an expression in two variables, x and y.
Thanks to the browser, it is not possible to tell what the inequalities are.
11
If you mean: y = 2x+5 then it is a straight line equation.
If you mean: y = 6x+11 and y = 2x+7 Then by substitution: x = -1 and y = 5
That is 27 x 9 = 243
189
The y value will equal 15, when x = 7
Since there is no equality (or inequality) sign in the question, there is no equation or inequality) and therefore nothing which can be solved.
263
127 easy math people
81
The sum of 27 occurrences of the number 9 is calculated by multiplying 27 by 9, resulting in 243.