What is the first step needed to solve 3 over 4 multiplied by x minus 3 equals negative 18?

add 3 to both sides
subtract 18 from both sides
multiply both sides by 3
divide both sides by 4

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.