How do I do these types of problems? (And how do I do this one specifically)

Mathematics

2 answers:

Ymorist [56]3 years ago

8 0

Idk lemme ask my son

zhenek [66]3 years ago

4 0

This is basically a part of PEMDAS.

First, you must do the parenthesis part, meaning to find the answer inside the parenthesis first.

Subtract 13.5–4.5 to get rid of the parenthesis. You get 9.

Now, finish the equation off: 5·9 (five times nine). You end up with 45.

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What is the value of x? (x + 40)° (3x)° A. 20 B.35 C. 60 D. 70

Olenka [21]

Hello!

We are given the equation below.

x+40=3x

We want to get all of the variables on side. First of all let's subtract 40 from both sides.

x=3x-40

Now we rearrange our equation so the commutative property will work.

x=3x+(-40)
x=-40+3x

Now we subtract 3x from both sides.

-2x=-40

We divide both sides by -2.

x=20

Our answer is A) 20.

I hope this helps!

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3 years ago

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kogti [31]

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2 years ago

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PolarNik [594]

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4 0

3 years ago

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Ne4ueva [31]

Given:

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