2(2.8+x)=10.4 2(x-3)=5.8 3(x+2.4)=10.5 13(x+5)=169 1.5(x+1.6
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2(2.8+x)=10.4 2(x-3)=5.8 3(x+2.4)=10.5 13(x+5)=169 1.5(x+1.6)=3.6
解题过程和验算方法
解题过程和验算方法
![2(2.8+x)=10.4 2(x-3)=5.8 3(x+2.4)=10.5 13(x+5)=169 1.5(x+1.6](/uploads/image/z/18370241-17-1.jpg?t=2%282.8%2Bx%29%3D10.4+2%28x-3%29%3D5.8+3%28x%2B2.4%29%3D10.5+13%28x%2B5%29%3D169+1.5%28x%2B1.6)
2(2.8+x)=10.4
2.8+x=5.2
x=2.4
2(x-3)=5.8
x-3=2.9
x=5.9
3(x+2.4)=10.5
x+2.4=3.5
x=1.1
13(x+5)=169
x+5=13
x=8
1.5(x+1.6)=3.6
x+1.6=2.4
x=0.8
2.8+x=5.2
x=2.4
2(x-3)=5.8
x-3=2.9
x=5.9
3(x+2.4)=10.5
x+2.4=3.5
x=1.1
13(x+5)=169
x+5=13
x=8
1.5(x+1.6)=3.6
x+1.6=2.4
x=0.8
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