Question

Rezolvati ecuatiile 5(x+3)+2=3(x+9); 6(3x+1)+4=2(10x+1)+4 25(x+1)+3=24x+35. 121+6*(x+2)=4(x+2)+139
(x+1)*10+1=9*(x+2). 12(2x+3)=3(7x+1)+39

Answer 1

5(x+3)=3(x+9)
Desfacem parantezele :
5x+5x3 = 3x+3x9
5x + 15=3x + 27
Egalam relatiile :
5x-3x= 27 -15
2x=12
x=12:2
x=6! 
Asta e prima!

Answer 2

5(x+3)+2=3(x+9)
5x+15+2=3x+27
5x+17=3x+27
5x-3x=27-17
2x=10
x=10:2
x=5
proba: 5(5+3)=3(5+9) ; 5ori8+2=3ori14 ;42=42