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Mathematics
4 November, 17:06
5y - 3z + 4y - 1z - 3y; y = 3 and z = - 2
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4 November, 17:21
0
5 (3) - 3 (-2)
15 - (-6) =
15+6=21
a negative plus a negative is a positive so its 21
4 (3) - 3 (-2)
12 - (-6)
12+6=18
21+18=39
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