1.4%x+3.7%x(20-x)=6250
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1.4%x+3.7%x(20-x)=6250
1.4%x+3.7%x(20-x)=6250
1.4%x+3.7%x(20-x)=6250
1.4%x+3.7%x(20-x)=6250
14x+37x(20-x)=625000
14x+74x-37x²=625000
37x²-88x+625000=o
因为/_\(想打一个三角型)
1.4%x+3.7%x(20-x)=6250
x-2=(104-x)+2 6x-59=10x-75 (x+10)+(x-15)=280-x4(x-62)=x-38 60x-40=(60+20)*(x-5) 32x+32*0.5-25x+64x=24x+496-49x x+15=3*(109-x ) 5(3x-1.4)=2(6x-0.5) 3(x+0.9)=5(x-1.7) 13x-4(2x+5)=17(x-2)-4(2x-1) (13x+8)/3=5x-1x-60=2[(3561-x)+100]+1 (x+9)+12=2[(x-9)-1
(X+X)+(X-X)+(X*X)+(X/X)=100
x*x*x*x*x=80000?
1.4x-x=9.8求x
x+(x-1.4)+1.5x=33.
x-20%x=45+20%x
x+x²=20,x=?
x - 15%x+20%x=23.
x-0.3x-0.5x=20
0.88(X+20%X)=X+84
X-30%X+8-X=20
x*x*(1/4)=20x
x(x-20)=x+10
30%x=50%x-20x
20x%+2=1.4+x/2
数学题1)(x-1)(x+1)=x²-1,(x-1)(x²+x+1)=x³-1,(x-1)(x^3+x^2+x+1)=(1)(x-1)(x+1)=x²-1,(x-1)(x²+x+1)=x³-1,(x-1)(x^3+x^2+x+1)= 猜想(x-1)(x^n+x^n-1+...+x^2+x+1)(2)(x-1)(x^48+x^48+...+x^62+x+1)=(3)(x^20-1
21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272