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2x+1,4(x+5)=2,4(x+5)

15+0,3(6x+5)=x+2(0,4x+1)

2+2,5(0,4x+1)=x+4,5
va rog. e urgent. îmi trebuie astazi


Răspuns :

2x+1,4x+7=2,4x+12
3,4x+7=2,4+12
3,4x-2,4x=12-7
1x=5 x=5
2x+1,4(x+5)=2,4(x+5)
2x+1,4x+7=2,4x+12
3,4x-2,4x=12-7
x=5

15+0,3(6x+5)=x+2(0,4x+1)
15+1,8x+1,5=x+0,8x+2
1,8x-1,8x=16,5-2
0 = 14,5  nu se poate

2+2,5(0,4x+1)=x+4,5
2+x+2,5=x+4,5
x-x=4,5-4,5
0=0