Solve for the Unknown: ?-2-(-4)=-20 Step by Step

Solve the following expression:

?−2−(−4)=−20 \text{?}-2-(-4)=-20

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:06 Let's find the unknown. Ready, set, go!
00:11 Remember, a negative times a negative, always makes a positive.
00:17 Next, we'll open the parentheses to simplify your expression.
00:22 Now, calculate the operation. You're doing great, keep it up!
00:33 Let's focus on isolating the unknown. Step by step, together!
00:38 Calculate each operation separately. Almost there!
00:47 And that's how we solve this question. Great job!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following expression:

?−2−(−4)=−20 \text{?}-2-(-4)=-20

2

Step-by-step solution

Note the following law:

−(−x)=+ -(-x)=+

Now let's write the exercise in the appropriate form:

?−2+4=−20 ?-2+4=-20

?−2=−20 ?-2=-20

We'll move minus 2 to the right side and maintain the appropriate sign:

?=−20−2 ?=-20-2

Now we get:

?=−22 ?=-22

3

Final Answer

−22 -22

Practice Quiz

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a is negative number.

b is negative number.

What is the sum of a+b?

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