Question

calculati x din:
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 :

Answer 1

1+{2*(3+5x-20):6}*7=8
1+[2*(5x-17):6]*7=8
1+10x-34/6*7=8
aducem la acelasi numitor comun
70x-238=48-6
70x=238+42
70x=280
x=280/70
x=4
{[(67x-186)*4-45]*14+290}:500=1
[(268x-744-45)*14+290]:500=1
[268x-789)*14+290]:500=1
(3752x-11 046+290):500=1
3752x-10 756/500=1
aducem la acelasi numitor comun
3752x=10756+500
3752x=11 256
x=11 256/3752
x=3
c) rezolvi cei in paranteze si vei obtine
x:8=9
x=9*8
x=72