问题
解答题
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答案
①4x+2(x-4)=22,
4x+2x-8=22,
6x=30,
x=5;
②
=56,Χ-1 12
×12=56×12,Χ-1 12
x-1=672,
x-1+1=672+1,
x=673;
③(x+3)×2-6=8,
2x+6-6=8,
2x=8,
x=4;
④0.36×5-
Χ=3 4
,3 5
1.8-
x=3 4
,3 5
1.8-
x+3 4
x=3 4
+3 5
x,3 4
1.8=
+3 5
x,3 4
+3 5
x-3 4
=1.8-3 5
,3 5
x=1.2,3 4
x÷3 4
=1.2÷3 4
,3 4
x=1.6.