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\(\dfrac{x-3}{13}+\dfrac{x-3}{14}=\dfrac{x-3}{15}+\dfrac{x-3}{16}\)
\(\Leftrightarrow x-3=0\)
hay x=3
a, 5.62 - 18:3
= 5.36 - 18:3
= 180 - 6
= 174
b, 54.13 + 36.54 + 54.19
= 54.(19+13+36)
= 54.68
= 3672
c, 34.5 - [53 -(15-9)2]
= 34.5 - [125 - (6)2]
= 34.5 - [125 - 36]
= 34.5 - 89
= 81
\(=\dfrac{3^{15}\cdot2^{22}+2^8\cdot2^{16}\cdot3^{16}}{2\cdot3^{18}\cdot2^{21}-7\cdot3^{15}\cdot2^{23}}\)
\(=\dfrac{3^{15}\cdot2^{22}\left(1+2^2\cdot3\right)}{3^{15}\cdot2^{22}\left(3^3-7\cdot2\right)}=\dfrac{1+4\cdot3}{27-14}=1\)
\(=\left(\dfrac{377}{-231}-\dfrac{123}{89}+\dfrac{34}{791}\right)\cdot\left(\dfrac{4}{24}-\dfrac{3}{24}-\dfrac{1}{24}\right)=0\)
\(42-\left(2x+32\right)=12:2=6\)
\(42-\left(2x+32\right)+6=6\)
\(42-\left(2x+32\right)=6-6=0\)
\(2x+32=42-0=42\)
\(2x=42-32=10\)
\(x=10:2=5\)
42-(2x+32)+12:2=6
42-(2x+32)+6 =6
42-(2x+32) =6-6
42-(2x+32) =0
2x+32 =42-0
2x+32 =42
2x =42-32
2x =10
x =10:2
x =5
nhớ kick cho mình nha
\(=36.54+23.72\)
\(=36.2.27+23.72\)
\(=72.27+23.72\)
\(=72\left(27+23\right)\)
\(=72.50=3600\)