nbsp;(c) 20 nbsp; x + ( minus;8) = 12 = gt; x minus; 8 = 12 = gt; x = 12 + 8 = gt; x = 20 ...

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Patterns and Mathematics

?+-8=12a -4 -...

Question

? + (−8) = 12
(a) −4
(−20)
(c) 20
(d) 4

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Solution

(c) 20

x + (−8) = 12
=> x − 8 = 12
=> x = 12 + 8
=> x = 20

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