42-3.5x=35.7
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42-3.5x=35.742-3.5x=35.742-3.5x=35.742-35.7=3.5x3.5x=6.3x=1.8
42-3.5x=35.7
42-3.5x=35.7
42-3.5x=35.7
42-35.7=3.5x
3.5x=6.3
x=1.8
42-3.5x=35.7
matlab中a=[x(11)/x,x(12)/x;x(21)/x,x(22)/x;x(31)/x,x(32)/x;x(41)/x,x(42)/x;x(51)/x,x(52)/x]咋错了
3.5x-x=7.x=?
3.5x-x=17.5
x+12.5=3.5x
x+12.5=3.5x
4.5X-X=3.5
x+12.5=3.5x
x+3.5x=9.
3.5x=x-3.65
x-30=x/3.5
3.5X-X=32
6.5x-4.5x=93.6-6.5x-3.5x
(x+7)(x+5)-(x+1)(x+5)=42
解方程((13x-x^2)/(x+1))(x+(13-x)/(x+1))=42
(13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42
（X+X)+(X-X)+(X*X)+(X/X)=100
求x 的值.x +3.5x =9.9;4.25x -x =4.55;10x -2.7x =58.4;6.8x +3.2x =100