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6.6x%5x

1.6x=64 x=40

6.6x-5x=64 1.6x=64 x=64÷1.6 x=40

6.6x-5x=64 1.6x=64 x=40

先把同类的合并,比如本题中,x和5x都含有未知数,所以把它们合并为6x 6x=6.6 x=6.6÷6 x=1.1

3x+6=5x-6 6+6=5x-3x 12=2x x=12÷2 x=6

x-3/5x=6+6 (1-3/5)x=12 2/5x=12 x=12÷2/5 x=30

利用一下乘法的结合律 同时把6巧妙地写成1X6 5X6+6 =5X6+1X6 =(5+1)X6 =6X6 =36

5/6【5/6(6/5x-1)-2】=x-3 5/6【x-5/6-2】=x-3 5/6【x-17/6】=x-3 5/6x-85/36=x-3 1/6x=23/36 x=23/6

x-6分之5=l5x20% x=5/6+3 x=5/6+18/6 x=23/6

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