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6÷-÷6 ×÷(-) ×3.2+5.6×0.5+1.2×50% [-(+)]÷
99× 11.58-(7+1.58) 84×(-) +(+)× ÷+×8 (-×)÷ 4-(+)× ÷(+×) (
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X- X= 2X + = 70%X+20%X= 3.6 25% + 10X =
X - 15%X = 6 8X+X=12 15X-3×= X÷=12
6X+5 =13.4 X÷= X+X=
4X-6×=2 X = × x + x = 4 X-21×=4
6X+5 =13.4 X=
X÷= X÷=12 X=× =30%
X+X=42 X+X=105 X-X=400 =
X+X=18 x-0.375x= X-X=12 5 X-2.4×5=8
(x- 4.5) = 7 x- 25%x = 10 x- x -4= 21 X+25%X=90
X-X= X+X=21 X+X= X+X=
X-X= 2X-X=
8X+= :X= +2X= 5X-= X-X=1 X+X=
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