alleryIf 3x - 7 = 11, what is x?
A4
B18
C6
D5
Answer & Solution
Correct answer: C. 6
1. Add 7 to both sides to get 3x = 18.
2. Divide both sides by 3 to get x = 6.
3. 18 is the value of 3x and 4 comes from subtracting 7.
_Source: Wikipedia, Elementary algebra, Linear equations with one variable_
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