I am stuck on how to solve this problem and no video is provided on how to do it.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

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.

The width of a rectangle is half as long as the length. the rectangle has an area of 18 square feet. what are the length and width of the rectangle?