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Tara says the solution of $4 (x - 2) = 20$ is $x = 3$ . Check her answer.

Class 7Checking Solutions by TrialSimple Equations

AWrong; $x = 3.5$
BWrong; $x = 7$
CRight; $4 \times 1 = 20$
DWrong; $x = 5.5$

Step-by-Step Solution

x = 3 : 4 \times (3 - 2) = 4

, not 20. Try

x = 7 : 4 \times 5 = 20

✓. (5.5 comes from treating it as

4 x - 2 = 20.

)

Answer: B) Wrong;

x = 7

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