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3a-2b
4u-12v
-1,5x
-x
2. a + 1/2
3. 3a-2b
4. -8u+12v
5. - 6/4 x
(-3a-1½):(-3)=a+⅓
(2,4a-1,6b):0,8=3a-2b
(4u-6v):(-½)=-8u+12v
(-⅘x):⅘=-1x=-x