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va rog frumos sa imi faceti si mie ecuatia : A. 3(X+2)+2X=61
B. 3(2X-4)+X=27
C. 3+2 (X-1)=17
D. 2X+3X=20
E. 7+2X+6X=63
F. 2 (X+5)=18
G. 5 (X+3)+2 (X+3)=56
Va rog mult . Dau ,,COROANA''


Răspuns :

A. 3(X+2)+2X=61
3X+6+2X=61
3X+2X=61-6
5X=55
X=11

B. 3(2X-4)+X=27
6X-12+X=27
6X+X=27+12
7X=39
X=5.5

C. 3+2(X-1)=17
3+2X-2=17
2X=17-3+2
2X=16
X=8

D. 2X+3X=20
5X=20
X=4

E. 7+2X+6X=63
2X+6X=63-7
8X=56
X=7

F. 2(X+5)=18
2X+10=18
2X=18-10
2X=8
X=4

G.5(X+3)+2(X+3)=56
5X+15+2X+6=56
5X+2X=56-15-6
7X=35
X=5