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sesenic [268]
2 years ago
9

Find the value of x. 3x +7 D 2x + 7 3x 16

Mathematics
2 answers:
Mashcka [7]2 years ago
7 0

Answer:

sum of interior angle of a triangle is 180 degree

so,

3x +7 + 2x+7 +3x+6 = 180

8x + 20 = 180

8x = 180 - 20

8x = 160

x = 160/ 8

x = 20

May it will help you

evablogger [386]2 years ago
5 0

Answer:

x = 20

Step-by-step explanation:

According to angle sum property of a triangle , sum of all the angles in a triangle is equal to 180°.

So,

(3x + 7) + (2x + 7) + (3x + 6) = 180

=  > 8x + 20 = 180

=  > 8x = 180 - 20 = 160

=  > x =  \frac{160}{8}  = 20

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