How do I do this problem with solution by elimination?
2x+y=3
-2x+5y=-9

(2, -1)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtract Property of Equality

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

2x + y = 3

-2x + 5y = -9

Step 2: Solve for y

Elimination

Combine equations:                    6y = -6Divide 6 on both sides:               y = -1

Step 3: Solve for x

Define equation:                    2x + y = 3Substitute in y:                       2x - 1 = 3Isolate y term:                        2x = 4Isolate y:                                 x = 2

The method to find the female dormitory is 2-d=800