x+3×(x+1)等于27 7x-2(x-5)=40 6x+4(10-x)=46

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x+3×(x+1)等于27 7x-2(x-5)=40 6x+4(10-x)=46
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x+3×(x+1)等于27 7x-2(x-5)=40 6x+4(10-x)=46
x+3×(x+1)等于27 7x-2(x-5)=40 6x+4(10-x)=46

x+3×(x+1)等于27 7x-2(x-5)=40 6x+4(10-x)=46
x+3×(x+1)=27
x+3x+3=27
4x=24
x=6
7x-2(x-5)=40
7x-2x+10=40
5x=30
x=6
6x+4(10-x)=46
6x+40-4x=46
2x=6
x=3

x=6
x=6
x=3

x+3×(x+1)等于27 7x-2(x-5)=40 6x+4(10-x)=46 x+3×(x+1)等于27 7x-2(x-5)=40 6x+4(10-x)=46 利用等式的性质解下列方程,并写出检验过程∶5x-3等于7,4x-1等于3x+3,x-5等于6,8-2x等于1011-x等于10x,4x-3等于2x-9,5+四分之一x等于二分之一x-4,0.8x等于0.7x-1.实在不懂, (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? *-----------------------------------------------*| 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 || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x X-1分之X+2+X-1分之X+3等于2 X-2分之X=X-5分之X-4怎么解?还有X减3分之X等于X减1分之X+1 f(x)=x的平方+1/x.(x大于等于2)的值域 (-3x²)(-x²+2x-1) 等于? (x+1)(x+2)(x+3)(x+4)等于多少 如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 3x+8-5【x+1】=2【x+6】-7x 等于多少? (5x+3)(5x-3)-7x(3x-1)-(2x-1)的平方等于多少? x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)...(x-49)等于多少? x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少