题目内容
解方程.
2×(x+7)-3.6=20.8
=4.5:5.4.
2×(x+7)-3.6=20.8
| X-1 |
| 12 |
(1)2×(x+7)-3.6=20.8,
2×(x+7)-3.6+3.6=20.8+3.6,
2×(x+7)÷2=24.4÷2,
x+7-7=12.2-7,
x=5.2;
(2)
=4.5:5.4,
5.4(X-1)=12×4.5,
5.4(X-1)÷5.4=54÷5.4,
X-1+1=10-1,
X=9.
2×(x+7)-3.6+3.6=20.8+3.6,
2×(x+7)÷2=24.4÷2,
x+7-7=12.2-7,
x=5.2;
(2)
| X-1 |
| 12 |
5.4(X-1)=12×4.5,
5.4(X-1)÷5.4=54÷5.4,
X-1+1=10-1,
X=9.
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