Question

Andrew correctly solved the equation as shown.

Given: 10 = {x + 4
Step 1: 10 – 4 = {x + 4 - 4
Step 2: 6 = {x
Step 3: 6
Step 4: 15 = x
Step 5: x = 15
What is the number in the parenthesis called? Where did that number come from?

Answer 1

The number in the parenthesis is called a variable and it represents an unknown value. The number '15' came from performing operations to isolate the variable 'x' in the equation.

Step-by-step explanation:

The number in the parenthesis is called a variable. It represents an unknown value that we are trying to solve for in the equation. In this case, the variable is represented by the letter 'x'.

The number '15' came from the equation after performing several operations to isolate the variable 'x'. Step 1 subtracted '4' from both sides of the equation to isolate 'x + 4' on one side. Step 2 simplified the equation to '6 = x'. Step 3 and 4 indicated that 'x' is equal to '6'. Step 5 represented the final value of 'x'.