\(318-5\left(x-64\right)=103\)

\(\Rightarrow5\left(x-64\right)=318-103\)

\(\Rightarrow5\left(x-64\right)=215\)

\(\Rightarrow x-64=43\)

\(\Rightarrow x=43+64\)

\(\Rightarrow x=107\)

_____________

\(4^x\cdot5+216=296\)

\(\Rightarrow4^x\cdot5=296-216\)

\(\Rightarrow4^x\cdot5-80\)

\(\Rightarrow4^x=16\)

\(\Rightarrow4^x=4^2\)

\(\Rightarrow x=2\)

___________

\(376-6^x:3=364\)

\(\Rightarrow6^x:3=376-364\)

\(\Rightarrow6^x:3=12\)

\(\Rightarrow6^x=36\)

\(\Rightarrow6^x=6^2\)

\(\Rightarrow x=2\)

___________

\(\left(4x-1\right)^2=121\)

\(\Rightarrow\left(4x-1\right)^2=11^2\)

\(\Rightarrow\left[{}\begin{matrix}4x-1=11\\4x-1=-11\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}4x=12\\4x=-10\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=3\\x=-\dfrac{5}{2}\end{matrix}\right.\)

107

2

2

TH1: 3; TH2: -5/2

a)364+225+436=(364+436)+225=800+225=1025

b)125x14x25x8x4=(125x8)x(25x4)x14=1000x100x14=100000x14=1400000

câu c bạn ra đề sai rồi để mk sửa lại rồi làm luôn.

sửa c) 36x49+64x49=(36+64)x49=100x49=4900

tk nha

\(364+225+436\)

\(=\left(364+436\right)+225\)

\(=800+225\)

\(=1025\)

a)(364+436)+225

=800+225

=1025

b)(125x8)x(25x4)x14

=1000x100x4

=400000

c)(49x64)x(36x49)

=3136+1764

=4900

a, \(\left(2x-4\right)\left(3x+12\right)=0\)

\(\Rightarrow\orbr{\begin{cases}2x-4=0\\3x+12=0\end{cases}}\)

\(\Rightarrow\orbr{\begin{cases}2x=4\\3x=-12\end{cases}}\)

\(\Rightarrow\orbr{\begin{cases}x=2\\x=-4\end{cases}}\)

b, \(697\div\frac{15x+364}{x}=17\)

\(\Rightarrow\frac{15x+364}{x}=697\div17\)

\(\Rightarrow\left(15x+364\right)\div x=41\)

\(\Rightarrow15x+364=41x\)

\(\Rightarrow15x-41x=-364\)

\(\Rightarrow-26x=-364\)

\(\Rightarrow x=-364\div\left(-26\right)\)

\(\Rightarrow x=14\)

1,

=66

2,

=28

3,

=2016+450-2016

=450

4, 

=360-360+111

=111

5,

=1972-638-972

=1972-972-638

=362

1) = 27 + 37 + 2

= 64 + 2 = 66

2) = 6 + 26 - 4 = 32 - 4 = 28

3) = (2016-2016)+450 = 450

4) =(364-364)+111 = 111

5) = (1972-972)-638 = 1000 - 638 = 362

1. 5 + 22 + 37 + 2

= 27 + 39

= 66

2. 12 - 6 + 26 - 4

= 6 + 22

= 28

3. (2016 + 450) - 2016

= 2016 + 450 - 2016

= 2016 - 2016 + 450

= 450

4. 364 - (364 - 111)

= 364 - 364 + 111

= 0 + 111

= 111

5. 1972 - (638 + 972)

= 1972 - 638 - 972

= 1972 - 972 - 638

= 1000 - 638 

= 362

\(a)\left(80\times96+40\times1808\right):1000\)

\(=\left(80\times96+40\times2\times904\right):1000\)

\(=\left(80\times96+80\times904\right):1000\)

\(=80\times\left(96+904\right):1000\)

\(=80\times1000:1000\)

\(=80\)

\(b)\) em xem lại đề xem có sai gì không em.

\(c)10\times12\times14\times16\times\left(88\times17-44\times34\right)\)

\(=10\times12\times14\times16\times\left(44\times2\times17-44\times2\times17\right)\)

\(=10\times12\times14\times16\times0\)

\(=0\)

12 . ( 64 + 36 ) = 12 . 100 = 1200

= 12 x ( 64 + 36 ) 
= 12 x 100 
= 1200 
Tick nhé

12 x 64 + 12 x 36

= 12 x ( 64 + 36 )

= 12 x 100

= 1200

a: B=(1+2-3-4)+(5+6-7-8)+...+(109+110-111-112)+227

=(-4)+(-4)+...+(-4)+227

=-112+227=115

b: =>(15x+364):x=41

=>15x+364=41x

=>-26x=-364

=>x=14