Find the value of x.

x=
(no need to do the classifying.)

Step-by-step explanation:

Well, we know that all three angles of a triangle add up to 180°, we set the three equations added together equal to 180°.

180 = x + 10 + 3x - 5 + x

We can simplify this to:

180 = 5x + 5

Now, all we need to do is solve.

Subtract 5.

175 = 5x

Divide by 5

x = 35°

Now, we must check this solution by substituting our solution for x in for x, to see if the values equal.

180 = 35 + 10 + 3 (35)  - 5 + 35

180 = 45 + 3 (35) - 5 + 35

180 = 105 + 45 - 5 + 35

180 = 150 - 5 + 35

180 = 150 + 30

180 = 180 ✅

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step-by-step explanation:

the answer is c.

step-by-step explanation: