Please help on the last part did the first two

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?