(2x+15):(5x+15)=3:5
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(x+y)-(x+y)平方 因式分解 解方程 2x²=3x (3x-1)² - 4=0 5x-15x
若2x平方-5x+5=0,求代数式:(15x平方-18x+9-(-3x平方+19x-31)-8x的值
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
初一数学x*x+2x+5的值为7,请求3x*x+6x+3的值.因为x*x+2x2x+3=3x(x*x+2x)+2x+2x
(先化简后求值)(3x/x+2-x/x-2)+2x/x^2-4,x=4-根号5,
4x-3(x-5)=2x+(x-1) (3x+29)除以8=4x 7(x+10)=5(4x-10) 5分之2(x-15)
5X-2(X-3)=15 X-3(2X+1)=6X-4(5-3X)
解方程5-5/6X=1/3 X-3/8X-2/8X=15 2X+5(30-X)=99
4x+7x=150-7 19x-5(3x-4)=24 2(4x-3)+(15-2x)=24+12