TÌM X : X x 6 = 66
Tìm số nguyên xx, thỏa mãn:\dfrac{6}{x}=\dfrac{-66}{77}.x6=77−66
Tìm số nguyên xx, thỏa mãn:\dfrac{6}{x}=\dfrac{-66}{77}.x6=77−66.
Trả lời:x=x=
ai nhanh tk liền
ai tích mình mình tích lại cho
\(\frac{6}{x}=\frac{-66}{77}.6x=77-66\)
=> \(\frac{6}{x}=\frac{-36x}{7}=11\)
=> \(x=\frac{6}{11}\)
... đề bị lộn ak
tìm X
b1.X x 7 - X+66:6=192+17
x*7 - x + 66 : 6 = 192 + 17
=> x(7 - 1) + 11 = 209
=> 6x = 209 - 11
=> 6x = 198
=> x = 33
vậy_
b1.X x 7 - X+66:6=192+17
=>X x(7-1)+11=209
Xx6+11=209
Xx6=209-11=198
x=198:6=33
vậy x=33
Tính nhẩm:
6 x 2
6 x 6
6 x 1
6 x 7
6 x 8
6 x 5
6 x 9
6 x 10
6 x 3
3 x 6
6 x 4
4 x 6
tìm x
x/6 + x/10 +x/15 + x/21 + x/28 + x/36+x/45 +x/55+x/66+x/78=220/39
Tìm số nguyên x biết
a, x/6+x/10+x/15+x/28+x/36+x/45+x/55+x/66+x/78=220/39
Tìm số ngyên x, biết : x/6+x/10+x/15+x/21+x/28+x/36+x/45+x/55+x/66+x/78=220/39
(x/6+x/10+...+x/66+x/78)*2=220/39*2
x/12+x/20+...x/132+x/156=440/39
x/2-x/3+x/3-x/4+...+x/11-x/12+x/12-x/13=440/39
x/2-x/13=440/39
11x/26=440/39
33x/78=880/78
33x=880
x=880/33
x=80/3=26, (6)
tinh nhanh: (132 x 6 - 66 x 12) x (132 x 6 + 66)
( 132 * 6 - 66 * 12 ) * ( 132 * 6 + 66 )
= ( 12 * 11 * 6 - 6 * 11 * 12 ) * ( 132 * 6 + 66 )
= 0 * ( 132 * 6 + 66 )
= 0