Question

Solve the system of linear equations by substitution
6x-9=y
y=-3x

Answer 1

x=1, y=-3. (1, -3).

Explanation:

6x-9=y

y=-3x

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6x-9=-3x

6x-(-3x)=9

6x+3x=9

9x=9

x=9/9

x=1

y=-3(1)

y=-3