6x-54等于30怎么解方程-搜答案-神马作文网

30%为0.3也就是3/10（x-2/5+14-x）/x=3/10（2/5+14）/x=3/10x=3/144

6/x=1/12x=6÷1/12x=72

x/3+x=18(1/3+1)x=18(4/3)x=18x=18÷4/3x=27/2x=13.5

3.4X+5.2x＝438.6x=43x=43÷8.6x=5

5.4x+x=12.86.4x=12.8x=2再答：谢就采纳再问：怎么采再答：点击评价,选择左边问题已解决再问：怎么采纳再问：哦再答：点击评价,选择左边问题已解决

7x减2x等于635x=63x=63/5

x²-6x-16=0(x-8)(x+2)=0x-8=0或x+2=0x1=8x2=-2

8减4x等于68-6=4x4x=2x=1/2

3.8X+5.2X=19.989X=19.98X=19.98/9X=2.22

2x*x=722x^2=72x^2=36x^2-36=0（x-6）（x+6）=0x=6或-6

7.5x-5.5x=0.752x=0.75x=0.375

7.8x-5x=47.52.8x=47.5x=47.5÷2.8

3x+x+6=264x=20x=5

1.5x-x=60.5x=6x=12

2X-4%x=7.2x=7.2/(2+0.04)=3.5312.5X-30%x=3.5x=3.5/(12.5-0.03)=0.28(保留的两位小数)

30-7x＝18.57x＝30-18.5＝11.5x＝23/14

6x-x=415x=41x=41/5x=8.2

x+20%=401.2x=40x=40÷1.2x=100/3

x=100×2-30=170