a) -13x = 39

=> x = 39 : (-13)

x= -3

b) 2x - (-17) = 15

=> 2x = 15 + (-17)

2x = -2

x = -1

c) -7-2x = 37-(-24)

-7-2x = 61

2x = -7-61

2x = -68

x = -34

d) -2.(2x+1) = -5.(x+1)

-4x - 2 = -5x - 5

=> -4x + 5x = -5 + 2

x = -3

a, 127 - 18 ( 5+6 ) =127 - 18 x11 = -71

b, 26 + 7(4-12) = 26 + 7 x (-8) =-30

TK nha!

a) 127 - 18.(5+6)

= 127 - 18.11

= 127 - 198

= -71

b) 26 + 7.(4-12)

= 26 + 7.(-8)

= 26 + (-56)

= -30

a,7630

b,3067

a 7630

b3067

xOy = bao nhiêu độ vậy bạn 

20 bạn ak

a) (5⁵⁶+5⁷):(5⁴⁹+1)=5⁷(5⁴⁹+1):(5⁴⁹+1)=5⁷

So sánh

ta có: 243³ < 243¹³

=> \(\frac{1}{243^4}>\frac{1}{243^{13}}\)

#

a/ là 8

b/ là 3615924564

HỌC TỐT NHÉ 

NHỚ CHỌN CHO MÌNH NHÉ

Bạn ghi cách làm giúp mình được không

a ) Ta có 

\(\frac{29}{33}>\frac{29}{37}\)( đồng tử khác mẫu )

\(\frac{22}{37}< \frac{29}{37}\)( đồng mẫu khác tử )

=> \(\frac{29}{33}>\frac{29}{37}>\frac{22}{37}\)

b )  \(\frac{163}{257}< \frac{163}{221}\)

  \(\frac{162}{257}>\frac{149}{257}\)

  \(\Rightarrow\frac{163}{221}>\frac{163}{257}>\frac{149}{257}\)

a) ta có: \(\frac{22}{37}< \frac{29}{37}\)

\(\frac{29}{33}>\frac{29}{37}\)

\(\Rightarrow\frac{22}{37}< \frac{29}{37}< \frac{29}{33}\)

b) ta có: \(\frac{163}{257}>\frac{149}{257}\)

\(\frac{163}{221}>\frac{163}{257}\)

\(\Rightarrow\frac{163}{221}>\frac{163}{257}>\frac{149}{257}\)

a)   \(\frac{3}{3}-\left(x-\frac{7}{3}\right)=-\frac{3}{4}-\frac{9}{8}\)

\(1-\left(x-\frac{7}{3}\right)=-\frac{15}{8}\)

\(x-\frac{7}{3}=1--\frac{15}{8}\)

\(x-\frac{7}{3}=\frac{23}{8}\)

\(x=\frac{23}{8}+\frac{7}{3}=\frac{125}{24}\)

b) \(3-\left(\frac{8}{3}-x+\frac{5}{4}\right)=1-\left(\frac{7}{6}-\frac{5}{12}\right)\)

\(3-\left(\frac{8}{3}-x+\frac{5}{4}\right)=\frac{1}{4}\)

\(\frac{8}{3}-x+\frac{5}{4}=1-\frac{1}{4}\)

\(-x=1-\frac{1}{4}-\frac{8}{3}-\frac{5}{4}\)

\(-x=-\frac{19}{6}\)

\(\Rightarrow x=\frac{19}{6}\)