Use substitution to solve the system x=2y-5 and -2x+5y=11

(-3, 1)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Algebra I

Solving systems of equations by substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

x = 2y - 5

-2x + 5y = 11

Step 2: Solve for y

Substitution

Substitute in x:                    -2(2y - 5) + 5y = 11Distribute -2:                       -4y + 10 + 5y = 11Combine like terms:           y + 10 = 11Isolate y:                              y = 1

Step 3: Solve for x

Define original equation:                    x = 2y - 5Substitute in y:                                     x = 2(1) - 5Multiply:                                                x = 2 - 5Subtract:                                               x = -3

Ibelieve it's a. 2.2 - x = -10.85 (plz tell me if it's right : ) )