a) 1.8-8x/1.2 - 1.3-3x/2= 5x-0.4/0.3 1,8-8x:(12/10)-1,3-1,5x=5x-(4/10):(3/10) 1,8-1,3-8x*(10/12)-1,5x=5x-(4/10)*(10/3) 0,5-8x*(5/6)-1,5x=5x-(4/3) 0,5-(20/3)x-(15/10)x=5x-(4/3) (5/10)-(3 i 2/3)x-(3/2)x=5x-(1 i 1/3) (1/2)-(3 i 2/3)x-(1 i 1/2)x=5x-(1 i 1/3) (3/6)-(3 i 20/30)x-(1 i 15/30)x=5x-(1 i 2/6) (3/6)-(4 i 35/30)x=5x-(1 i 2/6) (3/6)-(5 i 5/30)x=5x-(1 i 2/6) /+(1 i 2/6) (1 i 5/6)-(5 i 1/6)x=5x /+(5 i 1/6)x (1 i 5/6)=(10 i 1/6)x (11/6)=(61/6)x /:(61/6) (11/6)*(6/61)=x x=(11/61) b)3(1.2-x)/10 - 5+7x/4 = x + 9x+0.2/20 -4(13x-0.6)/5 (3,6-3x)/10-5+1,75x=10x+4-(52x-2,4)/5 0,36-0,3x-5+1,75x=10x+4-10,4x+0,48 -4,64+1,45x=-0,4x+4,48 /+0,4x -4,64+1,85x=4,48 /+4,64 1,85x=9,12 /:1,85 x=4,9 (w przybliżeniu!)
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