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How do you solve by substitution $3 x - y = - 6$ $3x - y = -6$ and $x + y = 2$ $x + y = 2$ ?

1 Answer

Jun 13, 2015

x= -1, y= 3

Explanation:

From 1st equation y= 3x+6. Plug it for y in the 2nd equation, x+3x+6=2,
4x= -4
x= -1. Therefore y= -3+6= 3

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