30×5+5(X-5)=(30×5+5x)×0.9

30(x+5)=26x+10x(x+5) 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. x-2/5x-(x-2/5x)2/3-(2/5x-1/3x)=30求x X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程 x-[2/5x+(x-2/5x-36)*2/3+36]=30 求x (16x-13)/(4x-3)-(20x-24)/(4x-5)=(32x-30)/(8x-7)-(40x-43)/(8x-9)求x x-三分之一x-四分之一x(x-三分之一x)=5 求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1 30x+5x=80x+5 15%x+30%x+5%x=6/5 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-16x=30x*x-7x-15 求x,可以只要答案.如图,全是正方形,一个边长为1,一个边长为4,求总面积,你也可以用你的方法.上面那个方程是我列的.5x*X+7X-72=0 (5x+?)平方=25x平方+30x+? 5/8X-30+3/10X+84=X x - 3/5x = 240 - 30 - x 40%x/(x+5)=30%x 怎么解 x-34-5/12x=30%x怎么解 1500-5【x+30】=5x