Question

calculati x din: cine ma ajuta 


a) 1+{2*[3+(x-4)* 5]:6}* 7=8
b) {[(67*x-186)*4-45]*14+290}:500=1
c) x:[(921-639):6-39]=9
D)36:(24-x)+29]:5=7
e) {2*[20-(5+x):6]-5}:9+17=20

ofer 12 pc. si cel mai inteligent raspuns pentru cei geni :P

Answer 1

a) 1+{2*[3+(x-4)* 5]:6}* 7=8
{2*[3+(x-4)* 5]:6}* 7=8-1
{2*[3+(x-4)* 5]:6}* 7=7
2*[3+(x-4)* 5]:6=1
2*[3+(x-4)* 5]=6
3+(x-4)* 5=3
(x-4)* 5=0
x-4=0
x=4

b) {[(67*x-186)*4-45]*14+290}:500=1
 [(67*x-186)*4-45]*14+290=500
 [(67*x-186)*4-45]*14=500-290
 [(67*x-186)*4-45]*14=210
(67*x-186)*4-45=15 
(67*x-186)*4=15 +45
(67*x-186)*4=60
67*x-186=15
67*x=15+186
67*x=201
x=3

c) x:[(921-639):6-39]=9
x=9*(282:6-39)
x=9*(47-39)
x=9*8
x=72

d)[36:(24-x)+29]:5=7
36:(24-x)+29=35
36:(24-x)=35-29
36:(24-x)=6
24-x=6
x=24-6
x=18

e) {2*[20-(5+x):6]-5}:9+17=20
 {2*[20-(5+x):6]-5}:9=20-17
 {2*[20-(5+x):6]-5}:9=3
 2*[20-(5+x):6]=27+5
 2*[20-(5+x):6]=32
20-(5+x):6=16
-(5+x):6=16-20
-(5+x):6=-4
(5+x):6=4
5+x=24
x=24-5
x=19