①1=-(x-1)/2+(x-2)/6-(x+2)/3 ②2/7×(3x-7)=2-1.5x
1个回答
1=-(x-1)/2+(x-2)/6-(x+2)/3
去分母得
6 = -3(x-1) + ( x -2) - 2(x+2)
整理得 4x = -9
解得 x = -9/4
相关问题
解方程:5x-2=3.6;7(x-1.2)=2.1;7.5×8-4x=20;9.6x-2.4x=21.6;4x-7×1.
-1/3(6-5x)=8x-2 / 2=2x+3 / 5x+1 /2 - x-1 / 4 =12/7(3x+7)=2 -
2.1X+7.9X=6.9 5X+0.8×2=7.12X+5.8=8.2 6X-3×4=1.2
因式分解:(1)x^2-7x+6(2)x^2-5x+6(3)x^2-5x-6(4)x^2-7x+8(5)x^2-7x+1
解方程:①[7/8]x=[5/6] ②[2/3]x-6=2 ③[2/3]×x×[1/2]=18.
1:1/2x-7=9x-2/62:1/5x-1/2(3-2x)=13:2x+1/3-5x-1/6=14:1/7(2x+1
(2x-1)/2-(2x+5)/3=(6x-7)/6-1
解方程.(1)X- 1 5 X= 3 8 (2)X× 4 7 × 7 12 =3(3)X+ 3 5 X= 3 5 × 2
(1).6(x/3+x-1/2 ) (2).(7-3a)+(5a-6) (3).(x-3)-(5x+7)
(7x-5)\4=3\8(2x-1)\6=(5x+1)\81\2 x-7=(9x-2)\61\5 x -1\2(3-2x