-3х+2=2х+7
-3x-2x=7-2
-5x=5
x=-5/5
x=-1
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3х^2у-9ху^2=3xy(x-3y)
1.4х-3.5=2.2-0.6х-14.5
1.4х+0.6х=3.5+2.2-14.5
2х=-8.8
х=-8.8\2
х=-4.4
(x+10)²=(5-x)²
x²+20x+100=25-10x+x²
20x+100=25-10x
30x=-75
x=-75/30,x=-25/10, x=-2,5
L=(-2,5+10)²=7,5²=56,25
P=(5-(-2,5))²=7,5²=56,25
L=P
x=-2,5
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-2(2x+8)-4x-12=-34
-4x-16-4x-12=-34
-8x=-34+12+16
-8x=-22+16
-8x=-6 Ι : (-1)
8x=6
x=6/8=3/4