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

Răspuns :

2(0,4x+1)-0,5=x-1
0.8x+2-0.5=x-1
2.5=0.2x
x=12.5
Deschiddm paranteza
2×0,4x+2×1-0,5=x-1
0,8x+2-0,5=x-1
0,8x+1,5=x-1
x-0,8x=1,5+1
0,2x=2,5
x=2,5÷0,2
x=12,5