rozwiąż równanie prosze o obliczenia a) -4 + x = 14,5 b) 5x + 7 = x +21 c) -3 + x =11
a) -4 + x = 14,5 14,5 + 4 = 18,5 x = 18,5b) 5x + 7 = x + 21 5x - x = 21 - 7 4x =14 / : 4 x = 3,5c) -3 + x = 11 11 + 3 = 14 x = 14
-4+x=14,5 -3+x=11
+4 +4 +3 +3
x=18,5 x=14
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a) -4 + x = 14,5
14,5 + 4 = 18,5
x = 18,5
b) 5x + 7 = x + 21
5x - x = 21 - 7
4x =14 / : 4
x = 3,5
c) -3 + x = 11
11 + 3 = 14
x = 14
-4+x=14,5 -3+x=11
+4 +4 +3 +3
x=18,5 x=14