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6x+9=39
The first step is subtracting 9 from both sides. This makes the equation:
6x=30
The second step is dividing by 6 on both sides. This would be the second step because x is being multiplied by 6, so you'd need to do the inverse and divide by 6. This would mean that x=5(because 30 divided by 6 equals 5).
Plug it back in to check:
6∙5+9=39
30+9=39
39=39
Therefore x=5 works.
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