2(x+7)=2x+7 How many solutions

5x-3=x+17
How many solutions

10+6x-3=2x+7+4x
4(x-2)+1=-7
30 points

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?

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish