1.75x-1.2X45%=1.56

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1.75x-1.2X45%=1.561.75x-1.2X45%=1.561.75x-1.2X45%=1.561.75x-1.2X45%=1.561.75x-0.54=1.561.75x=1.56+0.

1.75x-1.2X45%=1.56
1.75x-1.2X45%=1.56

1.75x-1.2X45%=1.56
1.75x-1.2X45%=1.56
1.75x-0.54=1.56
1.75x=1.56+0.54
1.75x=2.1
x=2.1/1.75
x=1.2

1.75x-1.2X45%=1.56
1.75x-5.4=1.56
1.75x=6.96
x=6.96÷1.75
x=3又175分之171