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Consider the system of equations
        5x + y = 31

3x + 4y = -39

 

Take your expression for y from part (a), and substitute it into the second equation. Solve for x and y.
 

Enter your answer as the ordered pair(x,y)

 Feb 18, 2022
 #1
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5x + y = 31           subtract   5x from both sides of the equation

 

y = 31 - 5x           substitute this value of 'y' into tht e second equation

 

 

3x   +  4 ( 31 - 5x)  = - 39           Now solve this equation for    'x'     then     y = 31 - 5x    and you are done !

 Feb 18, 2022

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