a) 3x-3=x+5\-x
2x-3=5
2x=5+3
X=8:2
X=4
b) 2/9(x-1)=1/4
X-1=1/4*9/2
X=9/8+1 (aici îl amplifici pe 1 cu 8)
X=9/8+8/8
X=17/8
C) x/2+4/2=72/10(aici 4/2vine de la amplificarea lui 2 prin 2)
X/2=72/10-20/10 (20/10 vine de la amplificarea lui 4/2 prin 5)
X/2=52/10
X=52/10:2
X=52/10*1/2=52/20=26/10=13/5
Sper ca te am ajutat
