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a x 3 + a x 6 + a = 36
a x 10 = 36
a = 36 / 10
a = 3,6 tk mk,mk tk lại !
1 x 3 x 5 + 2 x 6 x 10 + 3 x 9 x 15/3 x 5 x 12 + 6 x 10 x 24 + 9 x 15 x 36 = 15 + 120 + 8100 + 1440 + 4860 = 14535
\(\frac{1\times3\times5+2\times6\times10+3\times9\times15}{3\times5\times12+6\times10\times24+9\times15\times36}\)
\(=\frac{1\times3\times5\times\left(1+2^3+3^3\right)}{3\times5\times12\times\left(1+2^3+3^3\right)}\)\(=\frac{1}{12}\)
a) 15 + 3 ( x - 1 ) = 36
3 ( x - 1 ) = 36 - 15
3 ( x - 1 ) = 21
x - 1 = 21 : 3
x - 1 = 7
x = 7+1
x = 8
A = \(\frac{6x\left(1+8+27\right)}{6x\left(12+96+324\right)}\)= \(\frac{36}{432}\)=\(\frac{1}{12}\)
36.28+36.82+64.69+64.41=36.(28+82)+64(69+41)=36.110+64.110=110.(36+64)=110.100=110000
\(\left(x\times3+6\right):3=36\)
\(\Rightarrow x\times3+6=36\times3\)
\(\Rightarrow x\times3+6=108\)
\(\Rightarrow x\times3=108-6\)
\(\Rightarrow x\times3=102\)
\(\Rightarrow x=102:3\)
\(\Rightarrow x=34\)
Vậy \(x=34\)
~ Ủng hộ nhé
( x * 3 + 6 ) : 3 = 36
x * 3 + 6 = 36 x 3
x * 3 + 6 = 108
x * 3 = 108 - 6
x * 3 = 102
x = 102 : 3 = 34
\(\left(x\times3+6\right):3=36\)
\(x\times3+6=36\times3\)
\(x\times3+6=108\)
\(x\times3=108-6\)
\(x\times3=102\)
\(x=102:3\)
\(x=34\)
hok tốt
( X x 3 + 6 ) : 3 = 36
X x 3 + 6 = 36 x 3
X x 3 + 6= 108
X x 3 = 108- 6
X x 3 = 102
X = 102 : 3
X = 34
Vậy X bằg 34
\(\left(x\times3+6\right):3=36\)
\(x\times3+6=36\times3\)
\(x\times3+6=108\)
\(x\times3=108-6\)
\(x\times3=102\)
\(x=102:3\)
\(x=34\)
( x . 3 + 6 ) : 3 = 36
x . 3 + 6 = 36 . 3
x . 3 + 6 = 108
x . 3 = 108 - 6
x . 3 = 102
x = 102 : 3
x = 34
\(\left(x\cdot3+6\right):3=36\)
\(x\cdot3+6=36\cdot3\)
\(x\cdot3+6=108\)
\(x\cdot3=108-6\)
\(x\cdot3=102\)
\(x=102:3\)
\(x=34\)
(x . 3+6) : 3 = 36
x . 3+6 = 36 . 3
x . 3+6 = 108
x.3 =108-6
x.3 =102
x =102:3
x= 34