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解方程2(x+1.7)=9.2

(1)2(x+1.7)=9.2, 2(x+1.7)=9.2÷2, x+1.7=4.6,x+1.7-1.7=4.6-1.7x=2.9;(2)8x-4x=0.64, 4x=0.64,, 4x÷4=0.64÷4,x=0.16; (3)2x-0.24=0.12,2x-0.24+0.24=0.24+0.12, 2x=0.36, 2x÷2=0.36÷2x=0.18;(4)6.2x-x=416, 5.2x=41...

(1)2(x+1.7)=9.2, 2x+2×1.7=9.2, 2x+3.4-3.4=9.2-3.4, 2x=5.8, 2x÷2=5.8÷2, x=2.9;(2)3x-4×4.5=6.36, 3x-18=6.36, 3x-18+18=6.36+18, 3x=24.36, 3x÷3=24.36÷3, x=8.12;(3)7x+2.5x=3.8, 9.5x=3.8, 9.5x÷9.5=3.8÷9.5, x=0....

解: 2(x+1.7)=9.2 2(x+1.7)÷2=9.2÷2 x+1.7=4.6 x+1.7-1.7=4.6-1.7 x=2.9

x+1.7=9.2÷2=4.6 x=4.6-1.7=2.9

7/9+x=1解方程 7/9+x=1 x=1-7/9 x=2/9

2(x²+1)/X+1+6(x+1)/x²+1=7 [2(x²+1)/x+1]+[6(x+1)/ (x²+1)]=7 解:设:令u=(x²+1)/(x+1), 则,原式可化为 2u+6/u=7, 2 u²-7u+6=0, 则:(2u-3)(u-2)=0 则u1=3/2, u2=2 将“u=(x²+1)/(x+1)”代入“u1=3/2”...

6y2-7y+2=0两边同除以y得,得6y-7+2y=0,即2y+6y-7=0,∴y=x+1x2+1.故本题答案为:x+1x2+1.

(1)2(x+1.7)=9.2, 2(x+1.7)=9.2÷2, x+1.7=4.6, x+1.7-1.7=4.6-1.7 x=2.9; (2)8x-4x=0.64, 4x=0.64,, 4x÷4=0.64÷4, x=0.16; (3)2x-0.24=0.12, 2x-0.24+0.24=0.24+0.12, 2x=0.36, 2x÷2=0.36÷2 x=0.18; (4)6.2x-x=416, 5...

你好,很高兴为你解答 这样解方程 2x-2/7=1 2x=1+2/7 x=9/7÷2 x=9/14 满意采纳哦!

3分之2-x+7分之1=14分之9 x=2/3+1/7-9/14 x=2/3-(9/14-2/14) x=2/3-1/2 x=1/6 如有帮助,记得采纳,谢谢 祝学习进步!

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