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LiRa [457]
3 years ago
9

I really do not understand this math question please help me the top one

Mathematics
1 answer:
Daniel [21]3 years ago
8 0

Answer:

39

Step-by-step explanation:

the equation is:

4x - 15 + x = 180

4x + x - 15 = 180

5x - 15 = 180

    +15 = +15

5x - 0 = 195

5x/5 = 195/5

   x   =  39

(4x - 15) + x

(4(39) - 15) + 39

(195 - 15) + 39

141 + 39

180

A circle has 360 degrees but in the problem you are using half of it. You 180 that's why the whole equations has to equal 180 to be right.

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