If you mean: y = 6x+4 then it is a straight line equation with a slope of 6 and a y intercept of 4
It is impossible to solve for n if there's nothing to equate it with. No could be any number each except for -4. All we know is n = n
4 + (-2) + 5 = 7 BECAUSE adding a negative number is the same as subtracting the number, so 4 + (-2) = 2 and 2 + 5 = 7
Since there are two variables, there are an infinite number of solutions (combinations of x and y). The graph will be a straight line. You may want to solve for "y" or for "x" to get a better idea.
you put your finger on the 4 and move it right 9 times
the answer is 4
When simplified it is: 1-8x