Question

evaluate the expression when x = 5 and y = 1. x(1 + y) - 3(x - y) = ?

Explanation:

Step1: Substitute x=5, y=1

$5(1+1) - 3(5-1)$

Step2: Simplify parentheses first

$5(2) - 3(4)$

Step3: Perform multiplication

$10 - 12$

Step4: Calculate final subtraction

$10 - 12 = -2$

Answer:

$-2$