Solve (+x)-(+4x): Combining Like Terms with Positive Coefficients

(+x)−(+4x)= ? (+x)-(+4x)=\text{ ?}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Simplify
00:04 Negative times positive is always negative
00:15 Grouping factors
00:18 The coefficient of any number is always 1
00:21 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

(+x)−(+4x)= ? (+x)-(+4x)=\text{ ?}

2

Step-by-step solution

First, let's remember the rule:

−(+x)=−x -(+x)=-x

Now let's write the exercise in the following way:

x−4x= x-4x=

We'll add x x to the number line and go 4 steps to the left:

-X-X-X000XXX-2X-2X-2X-3X-3X-3X

Therefore the solution is:

x−4x=−3x x-4x=-3x

3

Final Answer

−3x -3x

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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