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

2 answers:

4 0

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!

Nezavi [6.7K]2 years ago

4 0

Answer with explanation:

It is given that

⇒ (x+40)°=(3x)°

Subtracting ,x from both sides

⇒3 x° -x° =40°

⇒ 2 x°=40°

Dividing by, 2 on both sides

x=20°

Option A:→20°

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3 years ago

The width of a rectangle is 3 units less than the length. The area of the rectangle is 28 units. What is the width, in units, of

KATRIN_1 [288]

Answer:

Step-by-step explanation:

Let's call the width W and the length L.

We know the width is 3 less than the length, so:

W = L - 3

And we know the area is 28, so:

28 = WL

If we solve for L in the first equation: