Question

evaluate the expression when x = 4 and y = 7. 3(3x + y) - 5x + 13 = ?

Explanation:

Step1: Substitute x=4, y=7

$3(3\times4 + 7) - 5\times4 + 13$

Step2: Calculate inner parentheses

$3(12 + 7) - 20 + 13$

Step3: Simplify parentheses

$3\times19 - 20 + 13$

Step4: Perform multiplication

$57 - 20 + 13$

Step5: Compute final sum/difference

$57-20=37; 37+13=50$

Answer:

50