x-45%=1.1
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(1)1.1x+x=6.3;合拼同类项,2.1x=6.3,x=3;(2)0.35+x=13.5,移项x=13.5-0.35=13.15;(3)0.7*(x+5)=3.5,方程两边同时除以0.7,x+5
(x+20)/7+x/4.8=45(x+20)/7+5x/24=4524(x+20)+7*5x=45*7*2439x+24*5*4=5*9*7*2439x+120*4=120*6339x=120*63
20%x+35%x=1.10.55x=1.1x=2(1-45%)x=16.50.55x=16.5x=3070%x-25%x=18.90.45x=18.9x=42
再答:对吗?再问:,没过程再问:,没过程再问:,没过程再答:不是有过程了吗?再问:哦谢谢
两边同时乘以55x+2x=2257x=225x=225/7
45-x=36+1.5x45-36=1.5x+x9=2.5xx=3.6
(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
展开就行了吧,利用tan的公式,
x÷0.8-x=45x-0.8x=45×0.8(1-0.8)x=360.2x=36x=36÷0.2x=180
x+0.3=1.8x=1.8-0.3x=1.5x-1.5=4x=4+1.5x=5.55x=1.5x=1.5/5x=0.3x÷1.1=3x=1.1*3x=3.33+x=5.4x=5.4-3x=2.4x-
0.2(45-x)=13-x0.2*45-0.2x=13-x9-0.2x=13-xx-0.2x=13-90.8x=4x=5很高兴为您解答,【the1900】团队为您答题.请点击下面的【选为满意回答】按
1.5x+0.8*1.1x=10.781.5x+0.88x=10.782.38x=10.78x=10.78/2.38x=4.53
0.25x=1x=4x-45%=1.1x=0.45+1.1x=1.55120%x-x=2.40.2x=2.4x=12
(x-5)+(x-3)+x+(x+3)+(x+5)=455x=45x=9
18=1.1X-X18=0.1XX=180
tan45=1所以原式=(1+tanx)/(1-tanx)+(tanx-1)/(1+tanx)=[(1+tanx)^2-(1-tanx)^2]/(1+tanx)/(1-tanx)=4tanx/[1-(
45%x÷(x+16)=25%45%x=25%(x+16)0.45x=0.25x+40.2x=4x=20
(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.
x=602(x/45)+x/90-x/60=12x/90+x/90-x/60=13x/90-x/60=16x/180-3x/180=1x=60