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How do you solve by Substitution $y = - x + 5$ $y = -x + 5$ and $2 x - 3 y = - 6$ $2x - 3y = -6$ ?

1 Answer

May 24, 2015

Substitute y from the 1st equation into the 2nd equation.
2x -3(-x + 5) = -6
2x +3x -15 = -6
5x = -6 + 15
5x = 9
x = 9/5 = 1.8
y = -1.8 + 5 = 3.2

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