Question

URGENT!!!
prin metoda mersului invers

Answer 1

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



369 - [(x+112):5+113] = 434
369-434= [(x+112):5+113]
- 65 = (x+112):5+113
-65-113=(x+112):5
-178=(x+112):5
(x+112)=5 x (-178)= - 890
x+112= - 890
x= - 890-112
x= -1002



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

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