Solve for the Missing Number in 17-?+4=5: Step-by-Step Guide

17?+4=5 17-?+4=5

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Identify the missing value
00:03 Given that there are only addition/subtraction operations
00:06 Use the commutative property and solve in a different order
00:10 Continue to solve the rest of the expression
00:24 Let's isolate our unknown
00:49 This is the solution

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

17?+4=5 17-?+4=5

2

Step-by-step solution

The question mark is the unknown, so we will refer to the exercise as an equation.

We arrange the exercise to isolate the question mark:

17+4?=5 17+4-?=5

We reduce:

21?=5 21-?=5

We move to thevariable to the other side and change to the correct sign:

21=?+5 21=?+5

We move the 5 to the other side and change to the correct sign: 215=? 21-5=\text{?}

16=? 16=\text{?}

3

Final Answer

16 16

Practice Quiz

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\( 8 - 2 + 6 = \)

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