Question

$a + 2b - 5c \: \: \: \: \: \: when \: a = 2 \: b = - 3$
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Answer 1

a + 2b - 5c

Given that, a = 2b = - 3

•°•

= - 3 - 3 - 5c

= - 6 - 5c

If - 6 - 5c = 0

Then, - 5c = 6

c = - 6 / 5