(29+2x)(22+2x)-29*22=159.5
(29-2x)(22-2x)=478.5 求x
(29+2x)(22+2x)-29*22=159.5
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)
解方程:(29-2x)(22-2x)=478.5
求y=2x+5/x-29(x
11x+42-2x=100-9x-22
5x+2(7-x)=29
2×(22-x)-4x=2,
152-x=(22+x)×2
2x+(22-x)=40
x-4/1x=8/3 x-0.8x=22 3/2x+2/1x=42
(27+2x)(21 -4x )=3/4*27*21;(22+2x)(29+2x )-22*29=1/4*22*29要详