Plz help me!!! I will give brainliest Translate these problems into algebra

1. When a number is subtracted from four times the number, the result is twelve.

2. The sum of a number and seven is one more than twice the number.

3. A jar contained 10 marbles. The jar had five less than half as many as were on the table.

4. Four times the sum of the ages of Ashton and Jack is 100. (jack is 12 years old)

5. When three is subtracted from twice a number, the result is one.

6. One more than the quotient of a number and five is six.

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?