Y=-2x+6
3y-x+3=0
Solving systems using substitution
1 answer:
You can "plug in" the value for y from the top eq in the bottom one:
3(-2x+6) - x + 3 = 0
Simplify:
-6x + 18 - x + 3 = 0
-7x + 21 = 0
-7x = -21
x = 3
y = -2*3+6 = 0
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