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Rusut42
a fost răspuns

2(x-1)-5x=18-7x
0,8x-3,5=-1,2x+0,5
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Răspuns :

Kitty200704

2(x-1)-5x=18-7x

2x-2-5x=18-7x

-3x-2=18-7x

4x-2=18

4x=20

x=5

0,8x-3,5=-1,2x+0,5

2x-3,5=0,5

2x=4

x=2

Dianageorgiana794

Răspuns:

2(x-1)-5x=18-7x

2x-2-5x=18-7x

-3x-2=18-7x

-3x+7x=18+2

4x=20=>x=20:4=>x=5

0,8x-3,5=-1,2x+0,5

0,8x+1,2x=0,5+3,5

2x=4=>x=4:2=>x=2

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