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Albert2008
a fost răspuns

101×[101-(101-102:x)]=202
369-[(x+112):5+113=434
104:[(x-3×8)×2:7]=13
VA ROG DAU COROANA URGENT!!!!

Răspuns :

Masami
•101×[101-(101-102:x)]=202 |:101
101-(101-102:x)=2
101-(101-102/x)=2
101-101+102/x=2
**101 se duce cu -101
[tex] \frac{102}{x} = 2[/tex]
2x=102
x=51
•369-[(x+112):5+113]=434
[tex]369-( \frac{x+112}{5} +113)=434[/tex]
[tex]369- \frac{x+112}{5} - 113=434[/tex]
[tex]256 - \frac{x+112}{5} = 434[/tex]
**aduci la numitor comun ca sa scapi de numitor
1280-(x+112)=2170
1280-x-112=2170
1168-x=2170
-x=2170-1168
-x=1002
x=-1002
•104:[(x-3×8)×2:7]=13
104:[(x-24)×2:7]=13
[tex]104: \frac{(x - 24) \times 2}{7} =13[/tex]
[tex]104: \frac{2x - 48}{7} =13[/tex]
[tex]104 \times \frac{7}{2x - 48} = 13[/tex]
[tex]104 \times \frac{7}{2(x - 24)} = 13[/tex]
**se simplifica 2 cu 104
[tex]52 \times \frac{7}{x - 24} = 13 [/tex]
[tex] \frac{364}{x - 24} = 13[/tex]
13(x-24)=364 |:13
x-24=28
x=28+24
x=52
Andreea2008M
101×[101-(101-102:x)]=202
101-(101-102:x)=202:101=2
101-2=(101-102:x)
99=101-102:x
101-99=102:x
2=102:x
x=102:2
x=51

104:[(x-3×8)×2:7]=13
104:13=(x-3×8)×2:7
8=(x-3×8)×2:7
8x7=(x-3×8)×2
56=(x-3×8)×2
56:2=x-3×8
28=x-24
x=28+24
x=52


la al doilea n-ai inchis paranteza dreapta, n-am stiut unde sa o pun


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