Question

a-5=4a
$- 1 - 5 = 4 - 1 \\ + 5 = - 4 \\ + 5 - - 4 \\ = - 1$
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Answer 1

by putting the value of a as 1

we get

$- 1 - 5 = 4( -1 ) \\ - 6 = - 4 \\ 6 { \not = }4$

Hope my answer will help you