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x+12!=17 用解方程

x+12-21=17x=17+21-12x=5+21=26

x+17+12=48 解:x+29=48 x=48-29 x=19

x+x=17/12(x+1/2)=17/12+1/4=5/3x+1/2=±√15/3x1 = -1/2-√15/3,x2 = -1/2+√15/3

7/19+x-8/9=2解 x=2+8/9-7/19 x=2又89/1717/12+x=17/24解 x=17/24-7/12 x=1/84/15+x=1-4/15解 x=1-4/15-4/15 x=7/15

x=6

x-12%=17.6x-0.12=17.6x=17.6+0.12x=17.72

x1/5x=12/17 4/5x=12/17两边同乘以8568x=60x=15/17

x=29 解法没问题.

17除以[x+0.2]等于12x+0.2=17÷12x+1/2=17/12x=17/12-1/2x=11/12

x+8=17移项变号x=17-8x=9

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