12.7-5x=7.7解方程
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(3.8+x)÷2=16.4(3.8+x)÷2×2=16.4×23.8+x=32.83.8+x-3.8=32.8-3.8X=29
咨询记录 · 回答于2022-11-14
12.7-5x=7.7解方程
可不可以快一点
您好!亲,这道题我们可以用等式的性质解方程,12.7-5x=7.712.7-5x+5x=7.7+5x12.7=5x+7.75x+7.7=12.75x+7.7-7.7=12.7-7.75x=55x÷5=5÷5X=1
6.7x-2.5×4=6.7
5×9-4x=25
(3.8+X)÷2=16.4
6.7x-2.5×4=6.76.7x-10=6.76.7x-10+10=6.7+106.7x=16.76.7x÷6.7=16.7÷6.7X≈2.49
5×9-4x=2554-4x =2554-4x+4x=25+4x54=4x +254x+25=544x+25-25=54-254x =29X=29÷4X=7.25
(3.8+x)÷2=16.4(3.8+x)÷2×2=16.4×23.8+x=32.83.8+x-3.8=32.8-3.8X=29
8(x-6.2)=41.6
2.7÷3x=1
8(x -6.2)=41.68(x-6.2)÷8=41.6÷8X-6.2=5.2X-6.2+6.2=5.2+6.2X=11.4
2.7÷3x=12.7÷3x×3x=1×3x2.7=3x3x=2.73x÷3=2.7÷3X =0.9