leii89
contestada

Find the solution for the system of linear equations by substitution: y = 3x + 4 and y = x + 2. Explain how
you found the solution.

Respuesta :

Space

Answer:

(-1, 1)

General Formulas and Concepts:

Pre-Algebra

  • Order of Operations: BPEMDAS
  • Equality Properties

Algebra I

  • Solving systems of equations by substitution/elimination

Step-by-step explanation:

Step 1: Define systems

y = 3x + 4

y = x + 2

Step 2: Solve for x

  1. Substitute:                              3x + 4 = x + 2
  2. Subtract x on both sides:      2x + 4 = 2
  3. Subtract 4 on both sides:      2x = -2
  4. Divide both sides by 2:          x = -1

Step 3: Solve for y

  1. Define:                    y = x + 2
  2. Substitute:              y = -1 + 2
  3. Add:                        y = 1

And we have our answer!

ramseycrick
Answer:
x= -1
y= 1

How: I took 3x + 4 and made it equal to x + 2, because they are each equal to Y. I solved for X, then plugged X in for one equation. Finally, I solved for Y

Work:
Ver imagen ramseycrick

Otras preguntas