How do I solve a system of equation? Can someone explain it to me?

For example:

x - y = 4

2x + y = 5

A manufacturing company ships its product in two different sizes of truck trailers. Each shipment is made in a trailer with dimensions 8 feet x 10 feet x 30 feet or 8 feet x 10 feet x 40 feet.

Jenny bought t toy cars. The cars came in 9 packages. Write an expression that shows how many toy cars were in each package. Type an asterisk (*) if you want to use a multiplication sign and a slash (/) if you want to use a division sign.

Olive walks at a rate of 4 miles per hour. She lives 2 miles from the news station. How long would it take her to walk home from the news station?

Blake looks at his checking account balance regularly. His three lowest balance during the year are as given.

In matrix form what is the final form for minimizie c=8x+6y+4z subject to 2x+3y+z> or equal to 6; x+2y - 2z > or equal to 4; x+y+2z > or equal to 2

How do you divide 6114 by 63

Write the sentence as an equation. 373 plus the product of 169 and u is t Type a slash (/) if you want to use a division sign.

Leila makes 9 dollars for each hour of work. write an equation to represent her total pay p after working h hours

What is the slope of the line shown below (-4,3) (3,1) a. 7/2 b,. 2/7 c. - 7/2 d.-2/7

A digital scale reports a 10 kg weight as weighing 9.998 kg. which of the following is true?