Question

-3x-3y=3 ,y=-5x-17 solving systems by substitution

Answer 1

Answer:

(-4, 3)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Equality Properties

Algebra I

• Solving systems of equations by substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

-3x - 3y = 3

y = -5x - 17

Step 2: Solve for x

Substitution

1. Substitute in y:                    -3x - 3(-5x - 17) = 3
2. Distribute -3:                       -3x + 15x + 51 = 3
3. Combine like terms:           12x + 51 = 3
4. Isolate x term:                     12x = -48
5. Isolate x:                              x = -4

Step 3: Solve for y

1. Define equation:                    y = -5x - 17
2. Substitute in x:                       y = -5(-4) - 17
3. Multiply:                                  y = 20 - 17
4. Subtract:                                 y = 3