23 if you mean (12-3)x(2+5)
-5 plus 0 is -5. That is true whatever the value of y.
Absolute value of -6+5 is 1.
2n plus 5 n would be 7n and its impossible to solve the value of n.
2x + 5
It is: 5+(3*7) = 26
to solve this one must know the value of x
Absolute value of -2+(-5) is 7.
An infinite amount of numbers. eg 123x1 is 123, 123x2 is 246 and so on
5
-6 (minus six).
5 + 5 = 10
It is: 5+(3*7) = 26