解方程.5.6+2x=10 &nbs...
解方程.5.6+2x=106-5x=1.3(x-1)÷0.08=2512÷(x+1)=3....
解方程.5.6+2x=10 6-5x=1.3 (x-1)÷0.08=25 12÷(x+1)=3.
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(1)5.6+2x=10
5.6+2x-5.6=10-5.6
2x=4.4
x=2.2
(2)6-5x=1.3
6-5x+5x=1.3+5x
1.3+5x=6
1.3+5x-1.3=6-1.3
5x=4.7
x=0.94
(3)(x-1)÷0.08=25
(x-1)÷0.08×0.08=25×0.08
x-1=2
x-1+1=2+1
x=3
(4)12÷(x+1)=3
12÷(x+1)×(x+1)=3(x+1)
3x+3=12
3x+3-3=12-3
3x=9
3x÷3=9÷3
x=3
5.6+2x-5.6=10-5.6
2x=4.4
x=2.2
(2)6-5x=1.3
6-5x+5x=1.3+5x
1.3+5x=6
1.3+5x-1.3=6-1.3
5x=4.7
x=0.94
(3)(x-1)÷0.08=25
(x-1)÷0.08×0.08=25×0.08
x-1=2
x-1+1=2+1
x=3
(4)12÷(x+1)=3
12÷(x+1)×(x+1)=3(x+1)
3x+3=12
3x+3-3=12-3
3x=9
3x÷3=9÷3
x=3
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