Question

Plz help me answer this

Answer 1

Answer: x = 1 and y = 7

Explanation:

first you substitude y for 7x

-5x + 2(7x) = 9

then you distribute

-5x + 14x = 9

then you combine like terms

9x = 9

then you divide both sides by 9

x = 1

then you subsitute the x value in the other equations

y = 7(1)

meaning y = 7

Answer 2

(1, 7)

x = 1

y = 7

General Formulas and Concepts:

Pre-Algebra

• Order of Operations: BPEMDAS
• Equality Properties

Algebra I

• Solving systems of equations using substitution/elimination

Explanation:

Step 1: Define systems

-5x + 2y = 9

y = 7x

Step 2: Solve for x

Substitution

1. Substitute in y: -5x + 2(7x) = 9
2. Multiply: -5x + 14x = 9
3. Combine like terms: 9x = 9
4. Isolate x: x = 1

Step 3: Solve for y

1. Define original equation: y = 7x
2. Substitute in x: y = 7(1)
3. Multiply: y = 7