82
a) (2-4)x3+12
-2x3+12
-6+12
+6
b) (-5-4)x3+12
-9x3+12
-27+12
-15
c) (5,8-4)x3+12
1,8x3+12
5,4+12
+17,4
d) (1/3-4)x3+12
-11/3x3+12
-11+12
+1
2) 2x3=6
-5x3=-15
5,8x3=17,4
1/3ou0,3333333...x3=1
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82
a) (2-4)x3+12
-2x3+12
-6+12
+6
b) (-5-4)x3+12
-9x3+12
-27+12
-15
c) (5,8-4)x3+12
1,8x3+12
5,4+12
+17,4
d) (1/3-4)x3+12
-11/3x3+12
-11+12
+1
2) 2x3=6
-5x3=-15
5,8x3=17,4
1/3ou0,3333333...x3=1