rozwiąż równania
7a+7=35
2-x=5-2x
69-x=x+96
1/2c+5=c+8
7a+7=357a=35-77a=28a=42-x=5-2x-x+2x=5-2x=369-x=x+96-x-x+96-69 -2x=27-x=13,51/2c+5=c+81/2c-c=8-5-1/2c=3-c=6
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7a+7=35
7a=35-7
7a=28
a=4
2-x=5-2x
-x+2x=5-2
x=3
69-x=x+96
-x-x+96-69
-2x=27
-x=13,5
1/2c+5=c+8
1/2c-c=8-5
-1/2c=3
-c=6