Question

I need to know how to solver this coz I needy grades up

Answer 1

The system is

2x + y = 8
 x  -  y  = 1

Let's solve this system using some of the steps outlined above. 
1.  Solve the first equation for y.  To do this, subtract 2x from both sides:       

      0 + y = 8 - 2x   =>  y = 8 - 2x
2.  Now let's look at the second equation.  See that y?  We  write out the 
      equation like this:    x - (     y     ) = 1
      (Must use those parentheses!)
     Whre you see y, write   8-2x instead:
                                       x - ( 8-2x) = 1
3.   Simplify this:             x  - 8 + 2x = 1
4.     Combine like terms:   3x - 8 = 1;    add 8 to both sides to isolate x:
5.    Isolate x:  3x = 9
6.    Sove for x:     x = 3.  Because x - y = 1, 3 - y = 1, so y must be 2.
7.    Set out the solution:  It's the point (3, 1).

Plese compare this solution with the one giv en in this problem.  Can you find any errors in Jenny's approach?  Please respond. 

Answer 2

Umm y = 2× + 8 ? Hard