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15 8 5x 7x 4 3x

15-8+5x=7x+4-3x 7+5x=3x+4 5x-3x=4-7 2x=-3 x=-1.5

你好! 3x+28/15=7x 解:-4X=-28/15 X=28/15×1/4 X=7/15 如果对你有帮助望点右上角采纳

一元一次方程: 1. 2(x-2)-3(4x-1)=9(1-x) 4x-4-12x+3=9-9x -8x+9x=9-3+4 x=10 2. 11x+64-2x=100-9x 11x-2x+9x=100-64 18x=36 x=2 3. 15-(8-5x)=7x+(4-3x) 15-8+5x=7x+4-3x 5x-7x+3x=4-15+8 x=-3 4. 3(x-7)-2[9-4(2-x)]=22 3x-21-2(9-8+4x)=22 3...

5.2x7/8=4.55

解:左边=28/23x=8,得,×=224/23

(3x/8+20)-(5x/8-20)=4 3x/8+20-5x/8+20=4 3x/8-5x/8+40=4 2x/8=40-4=36 x/4=36 x=36×4=144

二百道五年级方程题15-(8-5x)=7x+(4-3x) 3(x-7)-2[9-4(2-x)]=22 3/2[2/3(1/4x-1)-2]-x=2 2(x-2)-...

给你70道!!! 1.7(2x-1)-3(4x-1)=4(3x+2)-1 2.(5y+1)+ (1-y)= (9y+1)+ (1-3y) 3.[ (- 2)-4 ]=x+2 4.20%+(1-20%)(320-x)=320×40% 5.2(x-2)+2=x+1 6.2(x-2)-3(4x-1)=9(1-x) 7.11x+64-2x=100-9x 8.15-(8-5x)=7x+(4-3x) 9.3(x-7)-2[9-4(2-x)]=22 1...

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