maTematika 7

17. AC=2x da BC=5x; 7x=14, e.i. x=2. AC=2x=4sm. BC=5x=10sm.18. roca aqlems swyuria, misi masa wylis gareSe 40%-ia.800 $ 20Semdeg 20%; x=400.10040 x , xolo wylis dalevis100reziume:10. amocanebis amoxsna gantolebebis meSveobiTmoswavlem unda SeZlos amocanis pirobis gaTvaliswinebiT ucnobis Semotana, Sesabamisigantolebis dawera, anu pirobis gantolebaSi gadatana. gantolebis Sedgenis dros,masSi Semavali sidideebis erTi ganzomilebiT gamosaxva. amocanis pasuxis dadgena,maSinac, roca SerCeuli cvladiT ar aris aRniSnuli saZiebeli sidide.amoxsnebi, miTiTebebi:1. a) x+3(x-1)=21 x=6; b) 2·3x–25=29 x=9; g) x=5(x–8) x=10.3. x+x+320=5650 2660$; 2990$.4.asaki3 wlis Semdegmama x x+3Svili 75–x 75–x+3x+3=78–x+25, saidanac x=50;mama — 50 wlis, Svili — 25 wlis.5.fuZEe xferdi x+5P=x+2(x+5)=3x+103x+10=25 x=5fuZe — 5; ferdi — 10.7. 5x+x=180° 30°; 150°.8. erTi monakveTi — x sm; meore — (25–x)sm. x–(25–x)=1118sm; 7sm.12. x+x+2+x+4=84 26; 28; 30.79masc_cigni_VII_kl_cor.indd 79 03.07.2012 15:46:51