括号4x-5括号×3=81方程怎么解
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4x-2-3x-3=6+3x-4
-大括号-中括号-(-X)中括号大括号=-(-X)=X因为整式的值为-3,所以X=-3,所以X的相反数=3
1/2{3/2[4/3(2x/7-1)+4]+2}-x=-21/2{3/2[8x/21-4/3+4]+2}-x=-21/2[3/2(8x/21+8/3)+2]-x=-21/2[4x/7+4+2]-x=
(5x-1)/4=(3x+1)/2-(2-x)/315x-3=18x+6-8x+45x=13x=13/5
-3(x-2)+1=4x-(2x-1)去括号:-3x+6+1=4x-2x+1移项::-4x+2x-3x=1-6-1合并:-5X=-6系数化为1:X=6/5
能说具体一点吗,看不懂啦
1/7[1/5(x+2/3+4)+6]+8=91/7[1/5(x+2/3+4)+6]=11/5(x+2/3+4)+6=71/5(x+2/3+4)=1x+2/3+4=5x+2/3=1x=1/31/5[1
5(x+2)=3-2(x-1)去括号得5x+10=3-2x+2移项得5x+2x=3+2-10合并同类项得7x=-5系数化为1得x=-5/7
X-2/5X=9(2+4/7)X3/5=81/7x=135/7
(1/4-x)*2+(4/5-x)*2+6x=11/2-2x+8/5-2x+6x=12x=-11/10x=-11/20
把x=2带进去,左边=8+3*(-1)=5;右边=7-2=5.是解再答:-1/2带进去。左边=-2+3*(-6)=-20;右边=7.5。不是解再答:望采纳
-8x平方+10x=08x^2-10x=04x^2-5=0x(4x-5)=0x=0或x=5/44x平方=(3x-1)平方4x^2-(3x-1)^2=0(2x+3x-1)(2x-3x+1)=0(5x-1
4(3-x)²=64(3-x)²=64÷4=163-x=±43-x=4时,x=-13-x=-4时,x=7∴x=-1或x=7再问:不是先算乘方吗?谢谢
(1)(2x-1)/3=(x+2)/4-1,两边同时乘以12得:4(2x-1)=3(x+2)-12,8x-4=3x+6-12,x=-2/5(2)【x-1】/2=2-【x+2】/5,两边乘以10得:5(
5(x+1.5)=17.55x+7.5=17.55x=10x=2
2(x-3)=1-5(x+1)2x-6=1-5x-52x+5x=1-5+67x=2x=2/7
1/7[1/5(x+2/3+4)+6]=11/5(x+2/3+12/3)+6=7x+14/3=515/3-14/3=xx=1/3
(6x^2-3x)-2(7x-5)=6x^2-3x-14x+10=6x^2-17x+10
原式=先去括号3X-21+5X-20=153x+5x=15+20+218x=56x=7