maTematika 7

25.iyorom yofiliyosiCqare x x+10manZili 7x 6(x+10)7x=6(x+10), saidanac x=60km/sT. manZili qalaqebs Soris 7·60=420km.26. 24(x+25)=40(x–25), saidanac x=100m/wm.27. 2n–2; 2n; 2n+2.2n–2+2n+2n+2=866n=86 ar SeiZleba.28.wylis sawyisiraodenoba1 sT.-Si Cadis t sT.-Si CadisI auzi 160m 3 xm 3 txm 3 13-iT naklebiII auzi 117m 3 (x+14)m 3 t(x+14)m 3160+tx+13=117+tx+14t vRebulobT t=4. SevamCnioT, rom amocana ariTmetikulad, gamosaxulebisSedgeniT ufro iolad ixsneba.( 160 - 117)+ 13= 41429. 25x+x+2x=35030. aRvniSnoT marTkuTxedis sigane x-iT, maSin marTkuTxedis sigrZe iqneba — x+3,SevadginoT gantoleba x(x+3)–x 2 =21, saidanac x=7.marTkuTxedis gverdebia: 7, 10.31. x+0,3x=26, saidanac x=20kg.32. a) x+ x 7= 19; b) `x +2xj -1`2x + xj = 10.3 3 334.6, 4x( 175 - x)16=100 1000,4x=175-x1,4x=175x=12535.a) orniSna ricxvi, romlis erTeulebis cifria 3, aris 9 (13; 23; ... 93), xolo rocxvi,romlis aTeulebis cifria 3, aris 10 (30; 31; ... 39). am ricxvebs, ricxvi 33 saerTo aqvT,e.i. ricxvebis raodenobaa 18.b) 1-dan 99-mde 99:3=33 samis jeradi ricxvia, maTgan 3 erTniSnaa, e.i. 30.g) sul 99–9=90 orniSna ricxvia, maTgan 30 3-is jeradia, e.i. 60 orniSna ricxvi iyofa 3-ze.36. fexburTis — 3x; kalaTburTis — 4x; xelburTis — 5x.81masc_cigni_VII_kl_cor.indd 81 03.07.2012 15:46:52