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

For example:

x - y = 4

2x + y = 5

1 bird is yellow 5 are blue, how many birds are there in total?

A number increases by 10%, and then decreases by 10%. will the result be greater than, less than, or equal to the original number? explain.

Write an algebraic rule to describe the translation P (-8, 6)

The congruency of △MNO and △XYZ can be proven using a reflection across the line bisecting OZ. However, this congruency can also be proven using geometric postulates, theorems, and definitions.

Maria said the 4 in 400,000 has a value of 400 is maria correct explain

Each set of ordered pairs represents a function. Write a rule that represents the function (0, 1) (1,3) (2,9) (3,27) (4,81)

Twenty milligrams of the drug lincomycin is to be given for each kilogram of a person's weight. The drug is to be mixed with 250 cc of a normal saline solution, and the mixture is to be administered intravenously over a 1 hour period.

In the diagram below, QRS is an equilateral triangle and RT QS.

What is the solution of this system of linear equations? y=2x-3 2x=y-3 a. infinitely many solutions b. (0, - 3) c. (0,0) d. no solution

In calm waters, the oil spilling from the ruptured hull of a grounded tanker spreads in all directions.