rozwiąż i sprawdź równania ;
x+7 = 15
y-1 = 6
z-4 = -18
6x = -42
3x +6 = 9
1\2x = 11
4\9x = 1\3
-x -3 = x-4
8,3- 2x = 0,5
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x+7=15
x=15-7
x=8
spr.8+7=15
y-1=6
y=6+1
y=7
spr.7-1=6
z-4= -18
z= -18+4
z= -14
spr.-14-4= -18
6x= -42 /:6
x= -7
spr.6*[-7]= -42
3x+6=9
3x=9-6
3x=3 /:3
x=1
spr.3*1+6=3+6=9
1/2x=11 /:1/2
x=22
spr.1/2*22=11
4/9x=1/3 /:4/9
x=3/4
spr.4/9*3/4=1/3
-x-3=x-4
-x-x= -4+3
-2x= -1 /:[-2]
x=1/2
spr.-1/2-3=-1/2-6/2= -7/2= -3 1/2
1/2-4= -3 1/2
P=L
8,3-2x=0,5
-2x=0,5-8,3
-2x= -7,8 /:[-2]
x=3,9
spr.8,3-2*3,9=0,5