Răspuns:
a)
[ ( 324 + 205 : 5 -x ) : 6 ] * 3 + 127 = 307[(324+205:5−x):6]∗3+127=307
[ ( 324 + 41 -x ) : 6 ] * 3 = 307-127[(324+41−x):6]∗3=307−127
[ ( 365 -x ) : 6 ] * 3 = 180[(365−x):6]∗3=180
[ ( 365 -x ) : 6 ] = 180:3[(365−x):6]=180:3
( 365 -x ) : 6=60(365−x):6=60
365 -x = 60*6365−x=60∗6
365 -x =360365−x=360
x=5x=5
b)
[676:13:(31*20-31-a)]*45-23*91=247[676:13:(31∗20−31−a)]∗45−23∗91=247
[52:(620-31-a)]*45-2093=247[52:(620−31−a)]∗45−2093=247
[52:(589-a)]*45=247+2093[52:(589−a)]∗45=247+2093
\frac{52}{589-a} *45=2340
589−a
52
∗45=2340
\frac{2340}{589-a} =2340
589−a
2340
=2340
589-a= \frac{2340}{2340}589−a=
2340
2340
589-a=1=\ \textgreater \ a=589-1=\ \textgreater \ a=588589−a=1= \textgreater a=589−1= \textgreater a=588
c)
\{[(41+362:2)-32*6+a]*221:13\}-140:5=635{[(41+362:2)−32∗6+a]∗221:13}−140:5=635
\{[(41+181)-32*6+a]*221:13\}-140:5=635{[(41+181)−32∗6+a]∗221:13}−140:5=635
\{[222-32*6+a]*221:13\}-140:5=635{[222−32∗6+a]∗221:13}−140:5=635
\{[190*6+a]*221:13\}-140:5=635{[190∗6+a]∗221:13}−140:5=635
\{[1140+a]*221:13\}-140:5=635{[1140+a]∗221:13}−140:5=635
\{[1140+a]*17\}-140:5=635{[1140+a]∗17}−140:5=635
\{1140+a}*17-28=635
\{1140+a\}*11=635{1140+a}∗11=635
1140+a=635-111140+a=635−11
1140+a=6241140+a=624
a=1140-624a=1140−624
a=516a=516
d)
[(30+226:2+a:4):29+20*100]:5-11*6-5*67=0[(30+226:2+a:4):29+20∗100]:5−11∗6−5∗67=0
[(30+113+a:4):29+2000]:5-66-335=0[(30+113+a:4):29+2000]:5−66−335=0
[(143+a:4):29+2000]:5=401[(143+a:4):29+2000]:5=401
(143+a:4):29+2000=2005(143+a:4):29+2000=2005
(143+a:4):29=5(143+a:4):29=5
143+a:4=145143+a:4=145
a:4=145-143a:4=145−143
a:4=2a:4=2
a=4*2a=4∗2
a=8a=8
Explicație pas cu pas:
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