x - 3y = -6

5x + 3y = 42

Thank you for the opportunity to help you with your question!

Let's note 1 the first equation and 2 the second one.

1+2 provide 6x=36 so x=6

you replace in the first equation : 6-3y=-6 <=> 3y=12 <=> y=4

So x=6 and y=4

Good Luck

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