Answer :
EXPLANATION
Given the expressions:
(1) a(8x - 7) = b + 48x
Dividing both sides by 8x-7:
a= (b+48x)/(8x-7)
Now, considering the first expression and subtracting both sides by -48x
a(8x - 7) -48x = b
Applying the distributive property:
8ax -7a - 48x = b
Grouping like terms:
(8a-48)x - 7a = b
Switching sides:
b = (8a-48)x - 7a