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a fost răspuns

Rezolvati ecuatiile: 3*(x+1)+7=2*(x+1)+12 ; 5 +2*(2x+1)=5*(x-1) ; 5*(x+3)+2=3*(x+9) ; 6*(3x+1)+4=2*(10x+1)+4!!!Nu vreau rezultatul,ci rezolvarea completa!Jur ca dau funda celui care ma ajuta repede

Răspuns :

3(x+1)+7=2(x+1)+12
3×x+3×1+7=2×x+2×1+12
3x+3+7=2x+2+12
3x-2x=2+12-3-7
x=4

5+2(2x+1)=5(x-1)
5+2×2x+2×1=5×x-5×1
5+4x+2=5x-5
4x-5x=-5-5-2
-x=-12 |×(-1)
x=12

5(x+3)+2=3(x+9)
5×x+5×3+2=3×x+3×9
5x+15+2=3x+27
5x-3x=27-15-2
2x=10
x=10:2
x=5

6(3x+1)+4=2(10x+1)+4
6×3x+6×1+4=2×10x+2×1+4
18x+6+4=20x+2+4
18x-20x=2+4-6-4
-2x=-4 |:(-2)
x=2