解方程: 78×3x=3.6 x÷1.98=0.4 (4.5-x)×0.375=0.75 12
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/23 16:39:32
解方程:
78×3x=3.6 | x÷1.98=0.4 | (4.5-x)×0.375=0.75 |
①78×3x=3.6
234x=3.6 234x÷234=3.6÷234 x= 2 145 ②x÷1.98=0.4 x×1.98÷1.98=0.4×1.98 x=0.792 ③(4.5-x)×0.375=0.75 (4.5-x)×0.375÷0.375=0.75÷0.375 4.5-x=2 4.5-x+x=2+x 2+x-2=4.5-2 x=2.5 ④ 1 2x+ 2 3x=14 7 6x=14 7 6x× 6 7=14× 6 7 x=12 ⑤x-0.52x=3.2×0.15 0.48x=0.48 0.48x÷0.48=0.48÷0.48 x=1 ⑥ 1 2x+25%=10 0.5x+0.25=10 0.5x+0.25-0.25=10-0.25 0.5x=9.75 0.5x×2=9.75×2 x=19.5
解方程: 78×3x=3.6 x÷1.98=0.4 (4.5-x)×0.375=0.75 12
解方程:2x(x-1)-x(3x+2)=-x(x+2)-12
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
解方程:7.8乘3x=3.6 和 (4.5-x)乘0.375=0.75
解方程x²-x=x³-3x.
解方程{3X+X+2X=12}
解方程{3X×X×2X=12}
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1.12x+(x-3)+x=153(解方程)
解方程(2x-3/x)^2+5+12x=18/x
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