www.fltk.net > 2) ④35%1.2x=2.7x 3

2) ④35%1.2x=2.7x 3

(1)x2-2x-35=0,因式分解得:(x-7)(x+5)=0,可化为x-7=0或x+5=0,解得

=1.2×1.2×(2.7÷2.7) =1.44

0.3X 1.2-2X=1.6-2.7X 0.36-2x=1.6-2.7x 2.7x+2x=1.

0.3x+1.2-2x=1.2-2.7x 0.3x-2x+2.7x=1.2-1.2 x=0

3比12=2.7比x解比例 解:3x=12*2.7 3x=32.4

x=6/11

2.7x-23+2.3x=4x-16 2.7x+2.3x-4x=23-16

0.3x-2x+2.7x=1.2-1.2 x=0

2.7×1.2 27×0.23 0.27×33的脱式计算简便 =2.7x(1.2+10x0.23+

3(x一1)²=2.7 x-1=±√0.9 x1=1+3√10/10 x2=

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