210-30= 180
36:18= 2
180*2= 360
X+8=8x-8
x-8x=-8-8
-7x=-16
x=-16/(-7)
x=2.2/7
(x-2)*6 (x+3)*5
-------- - ----------=0
5 6
6x-12-(5x+15)
---------------------=0
30
6x-12-5x-15
-----------------=0
30
x-27
--------=0
30
x-27=0
x=27
1,5 / 3 × 20<span> = </span><span>10 м удав
10*1,5=15 м акула
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