55-3X=4解方程
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X-1.5=4X=4+1.5X=5.5再答:5x=1.5x=1.5÷5x=0.3再问:嗯再答:3+x=5.4x=5.4-3x=2.4再答:x-6=7.6x=7.6+6x=13.6
(x+1)(x+3)+4x=-13x方+4x+3+4x+13=0x方+8x+16=0(x+4)方=0x1=x2=-4
((X-2)(X-4)-(X-3)^2)/(X-3)(X-4)=((X-5)(X-7)-(X-6)^2)/(X-6)(X-7),-1/(X^2-7X+12)=-1/(X^2-13X+42),6X=30
4X+15-3X=17X=2
x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1
x^2-2x-3=0(x-3)(x+1)=0x=3,x=-1
5+3x=17.6-x3x+x=17.6-54x=12.6x=12.6/4x=3.15
4(123-x)=57+x492-4x=57+xx+4x=492-575x=435x=87
以上二式不是方程方程的解不是方程恒等式不是方程所谓方程是指含有未知量的代数式,你随便化简一下就可知啦
4x-3(20-x)=5x4x-60+3x=5x2x=60x=30
通分得[(x-8)(x-4)-(x-9)(x-3)]/(x-3)(x-4)=[(x+7)(x+3)-(x+2)(x+8)]/(x+8)(x+3)解得5/(x-3)(x-4)=5/(x+8)(x+3),
移项得2x+3x-4x=18合并同类项得X=18
(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)[(x-8)(x-4)-(x-9)(x-3)]/(x-3)(x-4)=[(x+7)(x+3)-(x+2)(
3x-20+4x=x+403x+4x-x=40+206x=60x=10
9x=90+4x9x-4x=905x=90x=18
x+(55-4x)/5=125x+55-4x=605x-4x=60-55x=5
3/8x+(x-3/8x)×2/3+55=x+1/4x3/8x+5/12x+55=5/4x11/24x=55x=120
4x:3=164x/3=16两边同乘以3得:4x=48x=48÷4x=12
4x-60+3x=37x=63x=9