History: Please help me in Geometry

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Please help me in Geometry - id8255751, steventhecool22

annamariaafowyhrq

05.02.2022

B) ( 9 + 12a ) + ( 3a + 7 ) = 76

Let us solve this equation :-

= ( 9 + 12a ) + ( 3a + 7 ) = 76= 9 + 15a + 7 = 76= 16 + 15a = 76 15a = 76 - 16

15a = 60

$a = \frac{60}{15}$

a = 4

Let us check whether it is correct or not :-

= ( 9 + 12 × 4 ) + ( 3 × 4 + 7 ) = 76

= 57 + 19 = 76°

Therefore , the correct option is :-

B) ( 9 + 12a ) + ( 3a + 7 ) = 76

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