TÌM X, (14 - x : 6) x 7 = 84
TÌM x biết (14 - x : 6 ) x 7 = 84
( 14 - x : 6 ) x 7 = 84
14 - x : 6 = 84 : 7
14 - x : 6 = 12
x : 6 = 14 - 12
x : 6 = 2
x = 2 x 6
x = 12
( 14 - x : 6 ) x 7 = 84
14 - x : 6 = 84 : 7
14 - x : 6 = 12
x : 6 = 14 - 12
x : 6 = 2
x = 2 x 6
x = 12
Tìm x
( 14 - x : 6 ) :7 = 84
( 14 - x : 6 ) : 7 = 84
( 14 - x : 6 ) = 84 x 7 =588
x : 6 = 14 - 588 = -574
x = - 574 x 6
x = - 3444
14 - x :6 = 84 nhân 7
14 - x : 6 = 588
x : 6 mà bằng 588 suy ra x phải lớn hơn 588 6 lần, suy ra x cũng lớn hơn 14
Vậy đề cho 14-x suy ra x ko có kết quả thỏa mãn đề bài
(14-x:6):7=84
14-x:6=84x7
14-x:6=588
14-x=588x6
14-x=3528
x=14-3528
x=-3514
Vậy x=-3514
Tìm X
a) 0,12 x X - 2 = 4
b) 231 - ( X - 6 ) = 1339 : 13
c) 7,99 x X + X x 2 + X : 100 = 7,9
d) ( 14 - X : 6 ) x 7 = 84
a)0,12.X-2=4
=>0,12.X=4+2
=>0,12.X=6
=>X=6:0,12
=>X=50
b)231-(X-6)=1339:13
=>231-(X-6)=103
=>X-6=231-103
=>X-6=128
=>X=128+6
=>X=134
c)7,99.X+X.2+X:100=7,9
=>X.(7,99+2+1/100)=7,9
=>X.10=7,9
=>X=7,9:10
=>X=0,79
d)(14-X:6).7=84
=>14-X:6=84:7
=>14-X:6=12
=>X:6=14-12
=>X:6=2
=>X=2.6
=>X=12
( 14 - x : 6) x 7 = 84
14 - x:6 = 84:7
14 - x:6=12
x:6=14-12
x:6=2
x=2x6
x=12
(14-x:6).7=84
=>14-x:6 =84:7=12
=>x:6 =14-12=2
=>x =2.6=12
vậy x=12
dúng đó k nha
Tìm số nguyên x biết :
a,-14 - 7+x= - 12 b,x+(-15)-(-6)=11
c,x-[18+(-7)]=15 d,-84+(-18-6)=x+(-20)
a) 14 x 6 30 x 7 84 : 4 66 : 3
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Tìm số nguyên x,biết
a,-14 - 7+ x= -12
b, x+(-15)-(-6)=11
c, x- mở ngoặc vuông 18+(-7) đóng ngoặc vuông = 15
d, -84- (-18-6) = x + (-20)
Giúp mình nhé thank you
a, -14 - 7 + x = -12
\(\Leftrightarrow-21+x=-12\)
\(\Leftrightarrow x=-12+21\)
\(\Leftrightarrow x=9\)
b, \(x+\left(-15\right)-\left(-6\right)=11\)
\(\Leftrightarrow x-15+6=11\)
\(\Leftrightarrow x-\left(15-6\right)=11\)
\(\Leftrightarrow x-9=11\)
\(\Leftrightarrow x=11+9\)
\(\Leftrightarrow x=20\)
c, \(x-\left[18+\left(-7\right)\right]=15\)
\(\Leftrightarrow x-\left(18-7\right)=15\)
\(\Leftrightarrow x-11=15\)
\(\Leftrightarrow x=15+11\)
\(\Leftrightarrow x=26\)
d, \(-84-\left(-18-6\right)=x+\left(-20\right)\)
\(\Leftrightarrow-84-\left(-24\right)=x+\left(-20\right)\)
\(\Leftrightarrow-84+24=x+\left(-20\right)\)
\(\Leftrightarrow-60=x+\left(-20\right)\)
\(\Leftrightarrow x=-20+60\)
\(\Leftrightarrow x=40\)
a, 3/4x X : 1/2 = 4/5
b,( 14-X: 6) x 7= 84
c,Xx 1,5 : 2,4 = 0,3
d,( 2 + 4/3 ) x 7/4 = 5-7/6
a) \(\dfrac{3}{4}\times x:\dfrac{1}{2}=\dfrac{4}{5}\)
\(\dfrac{3}{4}\times x=\dfrac{4}{5}\times\dfrac{1}{2}\)
\(\dfrac{3}{4}\times x=\dfrac{2}{5}\)
\(x=\dfrac{2}{5}:\dfrac{3}{4}\)
\(x=\dfrac{8}{15}\)
b) \(\left(14-x:6\right)\times7=84\)
\(14-x:6=84:7\)
\(14-x:6=12\)
\(x:6=14-12\)
\(x:6=2\)
\(x=6\times2=12\)
c) \(x\times1,5:2,4=0,3\)
\(x\times1,5=0,3\times2,4\)
\(x\times1,5=0,72\)
\(x=0,72:1,5\)
\(x=0,48\)
d) Thiếu x
Tìm số nguyên x biết:
a, -14 - 7 + x = -12 b, x + (-15) - (-6) = 11
c, x - [18 + (-7)] = 15 d, -84 - (-18 - 6) = x + (-20)
a,-14-7+x=-12 b,x+(-15)-(-6)=11 c,x-[18+(-7)]=15 d,-84-(-18-6)=x+(-20)
-21+x=-12 x+(-15)+6=11 x-11=15 -84-(-12)+x+(-20)
x=-12-(-21) x+(-9)=11 x=15+11 x+(-20)=-84+12
x=-12+21 x=11-(-9) x=26 x+(-20)=-62
x=9 x=11+9 x=-62-(-20)
x=20 x=-62+20
x=-42
a) -14 - 7 + x = -12
-21 + x = -12
x = 9
b) x + (-15) - (-6) = 11
x - 15 + 6 = 11
x - 9 = 11
x = 20