Oblicz : 5y=13 1/7x=-2 -7b=7/8
5y=13 /:5
y = 2,6
1/7x= -2 /*7
x = -14
-7b=78 /:-7
b=-7/78
myśle że pomogłam. :P
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5y=13 /:5
y = 2,6
1/7x= -2 /*7
x = -14
-7b=78 /:-7
b=-7/78
myśle że pomogłam. :P