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Anonymous
If: -5a = 300
Then: a = -60
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(5a).7 = -23 7(5a) = -23 35a = -23 a = -23/35 a= -0.657 (3 d.p.)
2a+5a+9a = 16a
A= 2
6a + 4 = 5a - 2 means that 6a - 5a = -2 - 4 which gives a = -6
5a - 1 = a - 7 4a = -6 a = -1.5