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Question

Solve:
(i) 2x+5=17
(2 marks)

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Solution

Given,

2x+5=17

Now to find value of x by hit and trial method
x
(1 mark)
2x + 5
(1 mark)
Result
(1 mark)
Is it 17 ?
Yes/No
1 2(1) + 5 7 No
2 2(2) + 5 9 No
3 2(3) + 5 11 No
4 2(4) + 5 13 No
5 2(5) + 5 15 No
6 2(6) + 5 17 Yes

Hence, the value x is 6. (2 marks)

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