解方程:6.9x=23.12 6(x+2)=72 6.8x+2.3×=30.02 (9-4.5)x=4.5 6.8x+2
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解方程:6.9x=23.12 6(x+2)=72 6.8x+2.3×=30.02 (9-4.5)x=4.5 6.8x+2.3×3=30.02 x÷(6.3-2.3)=1.1
6.8x+6.9x=27.4 1.8(x+0.2)=7.2 3x-4×6=48 6x+7x=26 x+3.5×3=18
6.8x+6.9x=27.4 1.8(x+0.2)=7.2 3x-4×6=48 6x+7x=26 x+3.5×3=18
6.8x+6.9x=27.4 13.7X=27.4 X=2
1.8(x+0.2)=7.2 X+0.2=4 X=3.8
3x-4×6=48 3X-24=48 3X=72 X=24
6x+7x=26 13X=26 X=2
x+3.5×3=18 X+10.5=18 X=7.5
1.8(x+0.2)=7.2 X+0.2=4 X=3.8
3x-4×6=48 3X-24=48 3X=72 X=24
6x+7x=26 13X=26 X=2
x+3.5×3=18 X+10.5=18 X=7.5
解方程:6.9x=23.12 6(x+2)=72 6.8x+2.3×=30.02 (9-4.5)x=4.5 6.8x+2
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