rozwiązaniem równania 2m(x+1) - 2 = 9m-x(1-2m) jest liczba x = -5 wyznacz liczbę m.
2m(x + 1) - 2 = 9m - x(1 - 2m)
2m(-5 + 1) - 2 = 9m - (-5)(1 - 2m)
2m * (-4) - 2 = 9m + 5(1 - 2m)
-8m - 2 = 9m + 5 - 10m
-8m - 2 = 5 - m
-8m + m = 5 + 2
-7m = 7
m = 7 : (-7)
m = -1 --------- odpowiedz
2m(x+1) - 2 = 9m - x(1-2m)
dla x = -5
2m(-5+1) -2 = 9m - (-5)(1-2m)
2m*(-4) - 2 = 9m + 5(1-2m)
-8m - 2 = -m + 5
-7m = 7 /:(-7) dzielimy obustronnie przez (-7)
m = -1
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2m(x + 1) - 2 = 9m - x(1 - 2m)
2m(-5 + 1) - 2 = 9m - (-5)(1 - 2m)
2m * (-4) - 2 = 9m + 5(1 - 2m)
-8m - 2 = 9m + 5 - 10m
-8m - 2 = 5 - m
-8m + m = 5 + 2
-7m = 7
m = 7 : (-7)
m = -1 --------- odpowiedz
2m(x+1) - 2 = 9m - x(1-2m)
dla x = -5
2m(-5+1) -2 = 9m - (-5)(1-2m)
2m*(-4) - 2 = 9m + 5(1-2m)
-8m - 2 = 9m + 5 - 10m
-8m - 2 = -m + 5
-8m + m = 5 + 2
-7m = 7 /:(-7) dzielimy obustronnie przez (-7)
m = -1
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