(x+30):(5x-30)=3:5
8x-16=32 x-8分之5x=32 7x-(6+3x)=30 4x+(5-3x)=19
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
3/x-1=4/x 6/x+1=x+5/x(x+1)
先观察下列各式,(x+5)(x+6)=x²+11x+30 (x-5)(x-6)=x²-11x+30
解方程5-5/6X=1/3 X-3/8X-2/8X=15 2X+5(30-X)=99
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
55-x=7(x+1) 30-3x=0.6(4+5x) 9+2x=3(7-x)解方程,要写出全过程!
关于一元一次方程的(1)0.6x+0.3=0.9x-0.2 (2)3(x-1)-7(x+5)=30(x+1)(3)(2x
(先化简后求值)(3x/x+2-x/x-2)+2x/x^2-4,x=4-根号5,
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
(x+30):(5x-30)=3:5