What is the output of y= 2/3x −4 when the input is 18?

What properties allow transformation to be used as a problem solving tool

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827