4 years ago

Solve the following system y= x+ 3 3x +y = 19

1 answer:

3 0

3x+y=19

y=19-3x and y=x+3, at a solution both x and y are equal so we can say y=y:

19-3x=x+3

19-4x=3

-4x=-16

x=4, and since y=x+3

y=7 so the solution is the point:

(4,7)

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