Aprofessional gambler reported that at the end of the first race at the track he had doubled his money. he bet $31 on the second race and tripled the money he came with. he bet $51 on the third race and quadrupled his original bankroll. he bet $84 on the fourth race and lost it, but still had $40 left. how much money did he start with?

The gambler came with $31.

Step-by-step explanation:

Let x be the initial amount.

At the end of the first race at the track he had doubled his money, that is 2x.

He bet $31 on the second race and tripled the money he came with.

Means 3x.

He bet $51 on the third race and quadrupled his original bankroll that is 4x.

He bet $84 on the fourth race and lost it, but still had $40 left.

Summing all the values, we get;

=>

=>

=> x = 31

Hence, the gambler came with $31.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^