52,7+7,5x5=(y+175):5+30
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a)175-y:35-30=110
175-y:30=110+30
175-y:30=140
y:30=175-140
y:30=35
y=35.30
y=1050
7/4-y.2/5+3/5=3/2
7/4-y.2/5=3/2-3/5
7/4-y.2/5=9/10
y.2/5=7/4-9/10
y.2/5=25/40
y=25/40 / 2/5
y=25/6
Thank you very much!
Cảm ơn bn nguyễn trung hiếu nhìu!
Chúc bn hok tốt nha!
\(a.\left(y.100-0,7357\right):0,01=0,55+15,88\)
\(\Leftrightarrow\left(100y-0,7357\right):0,01=16,43\)
\(\Leftrightarrow100y-0,7357=0,1643\)
\(\Leftrightarrow100y=0,9\)
\(\Leftrightarrow y=\frac{9}{1000}\)
\(b.14:\left(0,4+\frac{0,16}{y}\right)=7\)
\(\Leftrightarrow0,4+\frac{0,16}{y}=2\)
\(\Leftrightarrow\frac{0,16}{y}=1,6\)
\(\Leftrightarrow x=0,1\)
\(c.520+7,5.4=y+\frac{175}{5}+30\)
\(\Leftrightarrow520+30=y+65\)
\(\Leftrightarrow550=y+65\)
\(\Leftrightarrow y=485\)
30 : { 175 : [ 355 - ( 135 + 37 . 5] }
= 30 : { 175 : [ 355 - ( 135 + 185] }
= 30 : [ 175 : ( 355 - 320 ) ]
= 30 : ( 175 : 35 )
= 30 : 5
= 6
420+65.4=(x+175):5+30
=> 420 + 260 = ( x + 175 ) : 5 + 30
=> 680 = ( x + 175 ) : 5 + 30 <=> ( x + 175 ) : 5 + 30 = 680
=> ( x + 175 ) : 5 = 650
=> x + 175 = 3250
=> x = 3075
420+65.4=(X+175):5+30
=>420+260=(X+175):5+30
=>680=(X+175):5+30
=>680-30=(X+175):5
=>650=(X+175):5
=>650.5=X+175
=>3250=X+175
=>X=3250-175
=>X=3075
460 + 85 *4 = x + 175 / 5 + 30
460 + 340 = x + 35 + 30
800 = x + 65
x = 800 - 65
x = 735
460 + 85 *4 = x + 175 :5 + 30
460 + 340 = x + 35 + 30
800 = x + 65
x = 800 - 65 = 735
420 + 65 x 4 = ( x + 175 ) : 5 + 30
( x + 175 ) : 5 + 30 = 420 + 65 x 4
( x + 175 ) : 5 + 30 = 420 + 260
( x + 175 ) : 5 + 30 = 680
( x + 175 ) : 5 = 680 - 30
( x + 175 ) : 5 = 650
x + 175 = 650 x 5
x + 175 = 3250
x = 3250 - 175
x = 3075
420 + 65 . 4 = ( x + 175 ) : 5 + 30
420 + 260 = ( x + 175 ) : 5 + 30
680 = ( x + 175 ) : 5 + 30
680 - 30 = ( x + 175 ) : 5
650 = ( x + 175 ) : 5
650 . 5 = x + 175
3250 = x + 175
x = 3250 - 175
x = 3075
420+260=(x+175):5+30
680=(x+175):5+30
680-30=(x+175):5
650x5=x+175
3250=x+175
X=3250-175
X=3075
52,7 + 7,5 x 5 = (y + 175) : 5 + 30
90,2 = (y + 175) : 5 + 30
90,2 - 30 = (y + 175) : 5
60,2 = (y + 175) : 5
60,2 x 5 = y + 175
301 = y + 175
y = 301 - 175
y = 126
52,7 + 7,5 x 5 = (y + 175) : 5 + 30
90,2 = (y + 175) : 5 + 30
90,2 - 30 = (y + 175) : 5
60,2 = (y + 175) : 5
60,2 x 5 = y + 175
301 = y + 175
y = 301 - 175
y = 126
tick