Please help me with these 2 questions!

For the 1st equation y=19x+19b, the answer is b=-x+1/19y.

The 2nd equation 7p+5c=p, the answer is c= -6/5p.

Hope it helps.

Step-by-step explanation:

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %