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a fost răspuns

3.4x-21=16.4x
2(x-1.5)=3(x+4)
3(6x+7)=12x

Răspuns :

Renatemambouko
3.4x-21=16.4x
13x=-21
x=-21/13

2(x-1.5)=3(x+4)
2x-3=3x+12
x=-15

3(6x+7)=12x
18x+21=12x
6x=-21
x=-21/6
x=-7/2

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