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kushashwa
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HERE ALSO TRIAL AND ERROR;
ABSOLUTE VALUE OF 2x 7 = 9
that gives us x=1 or x=8

jimmyrep
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l2x7l = 9
2x  7 = 9
x = 8
OR
(2x7) = 9
2x = 2
x = 1

kushashwa
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did u understand the solution chandman

Chandman
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yes guys, thank you.