(2+4+6+...+2020) x (182 x 234 -91 x 468)
= (2+4+6+...+2020) x (91x2x234 -91 x 234x2)
= (2+4+6+...+2020) x 0
=0
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tìm x
a)-(2x + 15 ) + 13 = -234
b)2+4+6+8 +..............+2x=182
tìm x biết
a)x-\(\dfrac{3}{7}\)=\(\dfrac{2}{5}.\dfrac{1}{4}\)
b)x+\(\dfrac{4}{5}\)=\(\dfrac{-5}{12}\).\(\dfrac{3}{25}\)
c)\(\dfrac{x}{182}\)=\(\dfrac{-6}{12}\).\(\dfrac{35}{91}\)
tính nhanh :
a) 946 . 3 + 496 . 4 - 496 . 6
b) 2019 . (2020 + 1) - 2019 . 2020
c) 436 + 324 . (234 - 1) - 234 . 324 + 324
d) 472 . (36 - 1) + 35 . 8
tìm x
-2/3-1/3(2x-5)=3/2
x-2/182=(-6/14)x35/91
x:(7/2-31/6)=21/5-20/3
(5/3-x)x9/5=3,6
Tìm x biết:
a,x-5/7=1/9
b,2x/5=6/2x+1
c,11/8+13/6=85/x
d,2x-2/11=1.1/5
e,x/15=3/5+-2/3
f,x/182=-6/14.35/91
Tính nhanh
A= 4 x 2 x 25 x 5 x 175
B=42-104:(50 x 273-50 x 73)
C=3 x 53 x 6+2 x 9 x 87-18 x 40)
D=99 - 97 + 95 - 93 + 91-...+ 7 - 5 + 3 - 1
Tính nhanh
A= 4 x 2 x 25 x 5 x 175
B=42-104:(50 x 273-50 x 73)
C=3 x 53 x 6+2 x 9 x 87-18 x 40)
D=99 - 97 + 95 - 93 + 91-...+ 7 - 5 + 3 - 1
\(\dfrac{11}{8}+\dfrac{13}{6}=\dfrac{85}{2x}\)
\(\dfrac{3x}{182}=\dfrac{-6}{14}.\dfrac{35}{91}\)
Tìm x , biết
Tim x biet
g) \(\frac{x}{15}=\frac{3}{5}+\frac{-2}{3}\)
h) \(\frac{x}{182}=\frac{-6}{14}.\frac{35}{91}\)