You can put this solution on YOUR website! how does +3*x+9=0 ? I dont get it ....
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If x = -3,
+3*(-3) + 9 = -9 + 9 = 0
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The equation is true if x = -3
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Usually you see this:
3*x+9=0 solve for x
Subtract 9
3x = -9
Divide by 3
x = -3
