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Cosmisvdvdfeb
a fost răspuns

7X+14=0 ............2X-14=0....

11X-8=0

5X=7........3X+4X=21 ........va rog ajutatima !!

Răspuns :

Zbdaria
7x+14=0
7x=0-14
7x=-14
x=-14:7
x=-2

2x-14=0
2x=0+14
2x=14
x=14:2
x=7
11x-8=0
11x=0+8
11x=8
x=8:11
x= 0,(72) sau x= 8/11

5x=7
x=7:5
x=1,4 sau x=7/5
3x+4x=21
7x=21
x=21:7
x=3


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