➷ 3x + 9 = 12
Subtract 9 from both sides:
3x + 9 - 9 = 12 - 9
As you can see, the '9' would cancel out on the left side:
3x = 3
Divide both sides by 3:
x = 1
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3x + 9 =12
To solve for x you need to get it by itself.
First subtract 9 from both sides of the equation:
Now divide both sides by 3
x = 3/3
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