1 第4课时第1题答案
最佳答案:
5a;3a;ax;8a;7b;13x;5m;3n
2 第4课时第2题答案
最佳答案:
8+4x=0(√)
73-2x=5(√)
x+8=26(√)
3 第4课时第3题答案
最佳答案:
(1)x+30=100
(2)4x+4=16
4 第4课时第4题答案
最佳答案:
(1)x-3+5=65
(2)a+3=131
(3)4m=25.6
5 第4课时第5题答案
最佳答案:
(1)a=1;b=5
(2)c和d的和为14
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