解方程:①6x/3=2.7 ②4(3-x)/6=1.8 ③9(x+3)/2=18 ④2(5-x)+2-6=10x
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解方程:①6x/3=2.7 ②4(3-x)/6=1.8 ③9(x+3)/2=18 ④2(5-x)+2-6=10x
第二题检验!
第二题检验!
①
6x/3=2.7
6x=8.1
x = 1.35
②
4(3-x)/6=1.8
4(3-x)=10.8
12 - 4x =10.8
4x = 1.2
x = 0.3
检验:
4(3-0.3)/6
=(12 - 1.2) /6
=10.8 /6
=1.8
③
9(x+3)/2=18
9(x+3) = 36
9x + 27 = 36
9x = 9
x = 1
④
2(5-x)+2-6=10x
10 - 2x - 4 = 10x
12x = 6
x = 1/2
6x/3=2.7
6x=8.1
x = 1.35
②
4(3-x)/6=1.8
4(3-x)=10.8
12 - 4x =10.8
4x = 1.2
x = 0.3
检验:
4(3-0.3)/6
=(12 - 1.2) /6
=10.8 /6
=1.8
③
9(x+3)/2=18
9(x+3) = 36
9x + 27 = 36
9x = 9
x = 1
④
2(5-x)+2-6=10x
10 - 2x - 4 = 10x
12x = 6
x = 1/2
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