Hi,  

Solve using the SUBSTITUTION method: 

3x + y = 26    or y = -3x+26  (Green)   |Solving 1st EQ for y, so as to have something to 'substitute' for y in the 2nd EQ

-6x + y = -37 

-6x + (-3x+26) = -37    ||Substituting (-3x+26) for y gives the solution for x

     -9x = -63

       x = 7  and 

Ordered pair (7,5) is the solution for this system of EQuations



 

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