Question

solve this pls. Fast

Answer 1

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2     6     18
4     20    100
?     21    147
___________

Answer is 6.

Explanation:

Multiply first two number and add second number.

1. 2 x 6 + 6 = 18
2. 4 x 20 + 20 = 100
3. 6 x 21 + 21 = 147

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Answer 2

21+(x+1)=147
21x+21=147
21x=147-21
21x=126
x=126/21
X=6.
explanation::
in first line add 2+1 and multiply with 6.
--second line add 4+1 and multiply with 20.
then let the answer be x and add it with 1 and then multiply with 21.