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a,= 32.(11+67) +78.68
32.78+78.68
78.(32+68)
78.100
= 7800
b,76.(41-20)+21.24
=76.21+21.24
=21.(76+24)
=21.100
=2100
58 x 32 + 32 x 8 + 16 x 5
= 32 x ( 58 + 32 ) + 16 x 5
=32 x 90 + 16 x 5
= 16 x 2 x 90 + 16 x 5
= 16 x 180 + 16 x 5
= 16 x ( 180 + 5 )
= 16 x 185
= 2960
\(58.32+32.8+16.5\)
\(=16.116+16.16+16.5\)
\(=16.\left(116+16+5\right)\)
\(=16.137\)
\(=2192\)
\(a,\left(x-36\right):\left(2\cdot3^2\right)=2^3\cdot3\\ \Leftrightarrow x-36=432\\ x=468\\ b,2^x=32\\ \Leftrightarrow x=5\\ \Leftrightarrow x^3=27\\ \Leftrightarrow x^3=3^3\\ \Leftrightarrow x=3\\ d,1579+\left(625-x\right)=2023\\ \Leftrightarrow x=1579+625-2023\\ \Leftrightarrow x=181\)
A. \(\left(x-36\right):\left(2.3^2\right)=2^3.3\)
\(\left(x-36\right):\left(2.9\right)=8.3\)
\(\left(x-36\right):18=24\)
\(x-36=24.18\)
\(x-36=432\)
\(x=432+36\)
\(x=468\)
B. \(2^x=32\)
\(2^x=2^5\)
\(x=5\)
C. \(x^3=27\)
\(x^3=3^3\)
\(x=3\)
D. \(1579+\left(625-x\right)=2023\)
\(625-x=2023-1579\)
\(625-x=444\)
\(x=625-444\)
\(x=181\)
a ) | x | − 3 4 = 5 3 = > | x | = 29 12 = > x = 29 12 x = − 29 12
b) x − 3 2 = 1 = > x − 3 2 = 1 x − 3 2 = − 1 = > x = 5 2 x = 1 2
c) x − 3 2 + 11 4 = 15 4 = > x − 3 2 = 1 = > x = 5 2 x = 1 2
d) 17 4 − 5 6 − x = − 7 4 = > 5 6 − x = 6 = > x = − 31 6 x = 41 6
e)
x + 1 5 2 − 9 25 = 0 = > x + 1 5 2 = 9 25 = > x + 1 5 = 3 5 x + 1 5 = − 3 5 = > x = 2 5 x = − 4 5
f) x + 1 5 2 + 17 25 = 26 25 = > x + 1 5 2 = 9 25 = > x = 2 5 x = − 4 5
a. 32.(x-10)=32
x-10=32:32
x-10=1
x =1+10
x =11
b. (x-105):21=15
x-105 =15.21
x-105 =315
x =315+105
x =420
c. (x-5).(x-7)=0
x-5=0 hay x-7=0
x =0+5 hay x =0+7
x =5 hay x =7
a, 32 . ( x - 10 ) = 32
x - 10 = 32 : 32
x - 10 = 1
x = 10 + 1
x = 11
b, ( x - 105 ) : 21 = 15
x - 105 = 15 . 21
x - 105 = 315
x = 315 + 105
x = 420
c, ( x - 5 ) . ( x - 7 ) = 0
x - 5 = 0
x = 5
x - 7 = 0
x = 7
32.(x-10)=32
=>x-10=32:32
=>x-10=1
=>x=11
(x-78).26=0
=>x-78=0:26
=>x-78=0
=>x=78
(x-14):2=3
=>x-14=3.2
=>x-14=6
=>x=14+6
=>x=20
a) 32.(x-10)=32
x-10=1
x=11
b) (x-78).26=0
x-78=0
x=78
c) (x-14):2=3
x-14=6
x=20
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