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10-03-2017
Mathematics

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11c - 2d = -2
c + 8d = 8
using the substitution method

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10-03-2017

A) 11c - 2d = -2
B) c + 8d = 8
B) c = 8 - 8d then substitute this into A)

A) 88 -88d - 2d = -2
A) 90 = 90d
d = 1
c = 0

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