bpopescu50
5

# Aflati x-urile! a)1,2x + 1 pe 3 - 1,(3)=0,5x b)x+12 supra 15 - x+1 supra 5 = 0,(3) c)5 supra 3-o,5*x=0,(12)+0,2(13)*x d)7 supra 3 - \frac{1-1 supra 2+0,5*x}{2,5-1,(3)} = 4 supra 3 * x-0,(36) e)1 supra 3 { 1 supra 3[1 supra 3(1 supra 3 * x + 2]+2}-1=0  daca nu intelegeti la d dati la linkul asta sa il vedeti si puteti raspunde oriunde vreti  http://brainly.ro/tema/1911529

(1) Răspunsuri
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a) 12x/10 +1/3 -12/9= 5x/10 12x/10+1/3-4/3=5x/10 12x/10-5x/10 = 4/3-1/3 7x/10 = 3/3 7x/10=1 7x=10 x=10/7 b) (x+12)/15 - 3(x+1)/15 = 3/9 (x+12-3x-3)/15=1/3 (-2x+9)/15=5/15 -2x+9=5 -2x=5-9 -2x=-4 x=(-4):(-2) x=2 c) 5/3 - 5x/10 = 12/99+211x/990 1650/990 -   495x/990 = 120/990 + 211x/990 1650-495x=120+211x 1650-120=211x+495x 1530 = 706 x x=1530/706 = 765/353 d) 7/3 - [(0,5+0,5x)/ (25/10-12/9)]= 4x/3 -36/99 7/3 - [0,5(1+x)/ (5/2-4/3)]=4x/3 - 4/11 7/3 - [0,5(1+x)/(15-8/6)]=4x/3-4/11 7/3-[0.5(1+x)/(7/6)] = 4x/3-4/11 7/3 -[(1+x/2) * 6/7]=4x/3-4/11 7/3 - (3+3x)/7 = 4x/3 -4/11 7/3 - 3/7 - 3x/7 = 4x/3 -4/11 49/21 - 9/21 -9x/21 = 28x/21 -4/11 40/21+4/11 = 28x/21+9x/21 440/231 + 84/231 = 37x/21 524/231 = 37x/21 524/231=407x/231 524=407x x=524/407