32-0.2x=6.7
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2x+3x+5x=3210x=32x=3.2
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32x-7x-5x=420(32-7-5)x=42020x=420x=21
异项变号2x=28x=14
(X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问:请问X(X+2)=99解为什么就等于9了呢没看懂再答:换成算术法你就明
0.2x+0.4x=120.6x=12x=12÷0.6x=2020x+x=42021x=420x=420÷21x=20
3-0.2=1.2X-0.8X2.8=0.4XX=7
(80.51-x)/x=0.2(80.51-x)=0.2x0.2x+x=80.511.2x=80.51x=80.51÷1.2x=8051/120(120分之8051)
当然能算出来X-X×0.2=1.18(1-0.2)X=1.180.8X=1.18解得X=1.475
再答:采纳啊。再答:谢谢。
x-0.2x=800.8X=80X=100在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.
x-[(x-3500)*0.2-555]=9553x-[0.2x-700-555]=95530.8x+1255=95530.8x=8298x=10372.5
14x-6x²+10x²+5x=4x²-3x+3222x=32∴x=16/11
50%x=2再答:x=4再答:1.2x=2.4再答:x=2再答:1.05x=4.2再答:x=4再答:0.5x=0.2再答:x=0.4再答:请采纳再问:可不可以把式子、过程、答案合并在一起再答:那就是过
(2x-5)(3x+2)-6(x+1)(x-2)=6x²+4x-15x-10-6(x²+x-2x-2)=6x²-11x-10-6(x²-x-2)=6x²
x=2*[1.25(x-10)-10]x=2*[1.25x-22.5]x=2.5x-451.5x=45x=306.7-0.8x=3(1.7-0.2x)6.7-0.8x=5.1-0.6x1.6=0.2x
X平方+28X-160=32X^2+28X-192=0(X+14)^2=192+196X+14=±√388X=-14+2√97或X=-14-2√97.
(1)3x(x+0.2)=4x(x-1.1)3x+0.6=4x-4.44x-3x=0.6+4.4x=5(2)乘以0.8得4(1-x)=3x4-4x=3x4=7xx=4/7(7分之4)(3)1.1x1.