77 POINTS PLEASE ANSWER: A b and c share 90 pound the amount a and b get is in the ratio 1:2 the amount b and c get is in the ratio 4:3 how much does A get

Brainliest!!!

Step-by-step explanation:

A:B

1:2

B:C

4:3

B is both 4 and 2

In B:C, B is double (in ratio) than when B is in A:B

2:4:2

A:B:C

this would mean there is a total of 8

A would get  1/4 of the 90 pounds

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.