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Exercițiul 5: f), g) ,h) ,i) ,j)

Exercițiul 5 F G H I J class=

Răspuns :

Renatemambouko
f)
4x/5+3/4=x/2+3 1/2
4x/5+3/4=x/2+7/2
16x+15=10x+70
6x=55
x=55/6

g)
3,14x+0,(63)=2,14x+1,1(6)
3,14x-2,14x=(116-11)/90-63/99
x=105/90-63/99=7/6-7/11=(77-42)/66=35/66

h)
x×2,4=0,56
x×24/10=56/100
x=56/100 :24/10=56/100 ×10/24=7/10 ×1/3=7/30

i)
2,415x=1,05
2415x/1000=105/100
x=105/100 :2415/1000=105/100 ×1000/2415=7/1 ×10/161=70/161

j)
6,24-2x=3,12
2x=6,24-3,12
2x=3,12
2x=312/100
x=312/100: 2=312/200=39/25










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