rozwiąż równanie 9+x=1 7/8, -2,5c-8=17, x-4/5=0,8, -1/3y=10 , 6 1/8y=1, 6b-3=-9, 8a+4=36 , 0,4m-2=-6 , -3/4-1/4L=2,25, -8y=5 , -2,2+x=6,1, 8/9k+1/3=3
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9+x=1 7/8
9+x=15/8
x=15/8-9=15/8-72/8=-57/8=-7 1/8
-2,5c-8=17
-2,5c=17+8
-2,5c=25/-2,5
c=-10
reszta w załaczniku szybciej