Step-by-step explanation:
 
        
             
        
        
        
Answer:
(4/3, 7/3)
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality
<u>Algebra I</u>
- Terms/Coefficients
- Coordinates (x, y)
- Solving systems of equations of using substitution/elimination
Step-by-step explanation:
<u>Step 1: Define Systems</u>
7x - y = 7
x + 2y = 6
<u>Step 2: Rewrite Systems</u>
Equation: x + 2y = 6
- [Subtraction Property of Equality] Subtract 2y on both sides:                    x = 6 - 2y
<u>Step 3: Redefine Systems</u>
7x - y = 7
x = 6 - 2y
<u>Step 4: Solve for </u><em><u>y</u></em>
<em>Substitution</em>
- Substitute in <em>x</em>:                                                                                                7(6 - 2y) - y = 7
- Distribute 7:                                                                                                    42 - 14y - y = 7
- Combine like terms:                                                                                       42 - 15y = 7
- [Subtraction Property of Equality] Subtract 42 on both sides:                    -15y = -35
- [Division Property of Equality] Divide -15 on both sides:                             y = 7/3
<u>Step 5: Solve for </u><em><u>x</u></em>
- Define original equation:                                                                               x + 2y = 6
- Substitute in <em>y</em>:                                                                                                x + 2(7/3) = 6
- Multiply:                                                                                                           x + 14/3 = 6
- [Subtraction Property of Equality] Subtract 14/3 on both sides:                  x = 4/3
 
        
             
        
        
        
Answer:
from left to right 4,20,25,20
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Let's use the slope-intercept form of the equation of a line describe the slope and the y-intercept:
 y = mx + b where m=slope and b=y-intercept