Question

find the value of a if 15(a_4)-2(a-9)+5(a+6)=0

Answer 1

Answer:

2/3

Step-by-step explanation:

Hope you meant :

15 ( a - 4 ) - 2 ( a - 9 )  + 5 ( a + 6 ) = 0

= > 15 a - 60 - 2 a + 18 + 5 a + 30 = 0

= > 15 a - 2 a + 5 a - 60 + 18 + 30 = 0

= > 18 a - 12 = 0

= > 18 a = 12

= > a = 12/18

= > a = 2/3

The value of a = 2/3

Answer 2

Here is your answer

$15(a - 4) - 2(a - 9) + 5(a + 6) = 0 \\first \: we \: open \: brackets \\ 15a - 60 - 2a + 18 + 5a + 30 = 0 \\ like \: terms \: are \: on \: one \: sides \\ 15a + 5a - 2a - 60 + 18 + 30 = 0 \\ 20a - 2a - 60 + 48 = 0 \\ 18a - 12 = 0 \\18 a = 12 \\ a = \frac{12}{18} \\ a = \frac{2}{3}$
Hope it helps