Hi,

solving by elimination

3r-8s=-55

8r+3s=48



    3r  -8s=-55

(64/3)r +8s=48*8/3 = 128  |multiplying the 2nd EQ thru by (8/3) to eliminate r

    (73/3)r = 73

        

         r = 3  and s = 8



CHECKING our Answer

3r-8s=-55

 9 - 64 = -55 

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
 3r-8s=-55

8r+3s=48

How do you do elimination?

-------------

Multiply the equations to get matching coefficients for one of the variables.

3r-8s=-55 times 3 --> 9r - 24s = -165

8r+3s=48  times 8 -->64r + 24s = 384

---------------------

9r - 24s = -165

64r +24s = 384

------------------- Add

73r = 219

r = 3

--------

Sub r into any equation and solve for s.

 

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