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ce numar si-a ales george daca il aduna cu 7 , inmulteste suma cu 9 , adauga la produs 3 si de 3 ori , scade 149 , imparte la 100 diferenta si obtine 4 ?

Răspuns :


[(x+7)*9+(3*3)-149 ]:100=4

9X+63+9-149=400

9X=400+149-9-63

9X=477

X=477/9 = 53

{{(x+70)x9 +3}x3-149}:100=4
{(x+70)x9 +3}x3-149}=400
{(x+70)x9 +3}x3=400+149=549
{(x+70)x9 +3}=549:3=183
(x+70)x9=183-3=180
(x+70)=180:9=20
x=20-70
x=-50