2x-3.2=12.
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2x-3.2=12.
移项
2x=12.8+3.2
2x=16
2x÷2=16÷2
x=8
2x-3.2=12.
1.(1/X-1 )-2=X^-3X/X^-12.(X/X+1)^+5(X/X+1)+6=03.(8(X^+2X)/X^-1)+ 3(X^-1)/X^+2x
7.2x-3.2x-7.8=12.
10x+2x+5=3x+2x-12.x=?
10x+2x+5=3x+2x-12.x=?
f(x)=x^2+x (x
x-2/5x=3.2 x=
15x+(3.2x+2)×3=6x+2
6.2x+2x=12.
(3.1x-3.2)×2=3x
8X-3.2+2X=15.7
5x+(8-x)=12.6x-(12+2x)=4怎么做5x+(8-x)=12.
2x-7/4x=13 3x+1/3x=20/21 x-0.28x=12.
4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2)除2=71
函数的值域,用两绝对值型1.f(x)=x∧2-x+1/x∧2+x+12.f(x)=x-x∧2/1+x∧23.f(x)=5/x∧2+4x+74.f(x)=x∧2+4x+9/x∧2+3x+55.f(x)=|x-2|+|x+3|6.f(x)=|x+1|-|2-x|
x^2=x
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,