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AleeXoxo12
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Rezolvati in Z ecuatiile

a) 8x=x+49
b)-9x+10=2x-12
c)2x-6-13=x-21

Răspuns :



 8x=x+49
7x=49
x=49:7
x=7




-9x+10=2x-12
11x=22
x=22:11
x=2





2x-6-13=x-21 
x-19=-21
x=-2
a)8x=x+49
8x-x=49
7x=49
x=49:7
x=7

b)-9x+10=2x-12
-9x-2x= -10-12
-11x= -22
x=(-22):(-11)
x=2

c)2x-6-13=x-21
2x-19=x-21
2x-x=19-21
x= -2

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