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现在参加这个测试
Equations Lesson 2
2b + 3b + 1 = 16
+ 1 = 16
5b
-1 -1
b = 3
=
9a - 2a + 10 = 31
+ 10 = 31
7a = 21
a = 3
-10
7
-5t + 21 - 6t - 20 = -43
-11t +
-11t = -44
-1 -1
t =
= -43
-5t - 30 - 6t + 40 = -100
+ 10 = -100
-10 -10
t = 10
= -110
参加了这次测试的学生也参加了 :
Experimental probability and complimentary events
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