Question

Evaluate each expression below.
1. 7-2(x-4) when x=5​

Answer 1

5

Explanation:

`7-2(x-4)\qquad\text{put}\ x=5\ \text{to the given expression}\\\\7-2(5-4)\qquad\text{use PEMDAS - Parentheses first}\\\\=7-2(1)\qquad\text{Next Multiplication}\\\\=7-2\qquad\text{Next Subtraction}\\\\=5`

Answer 2

5

Explanation:

7−2×(5−4)

7−2×1

7−2

5