Question

I’m confused with this

Answer 1

(3x)+(7x+5)+(x+10)=180
11x+17=180
11x=180-17
11x=163
x=163/11
x=14.818
Then just plug that in as x for all three angles

Answer 2

Explanation:

We know that the sum of all the angles of a triangle add up to 180 degrees.

So, let's combine like terms:

7x + 3x + x = 11x

5 + 10 = 15

So, 11x + 15 = 180

We can rearrange the equation to look like this:

180 - 15 = 11x

180 - 15 = 165

So, 11x = 165

Then, divide:

165 / 11 = 15

So, x = 15.

Now we can find the measure of all the angles!

3x = 3 x 15 3 x 15 = 45.

7x + 5 = (7 x 15) + 5 7 x 15 = 105 105 + 5 = 110

x + 10 = 15 + 10 15 + 10 = 25

So, the angles are:

45 degrees

110 degrees

And 25 degrees