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\(58\times57+58\times50-58\times25=58\times\left(57+50-25\right)=4756\)
58 × 57 + 58 × 50 - 58 × 25
= 58 × (57 + 50 - 25)
= 58 × 82
= 4756
a. 42 . 46 + 42 . 52
= 42 . (46+52)
= 16 . 98
= 1568
b. -75+58+(-25)
= [-75+(-25)]+58
= -100+58
= -42
c. -4 . 5 . (-25)
= [-4 . (-25)] . 5
= 100 . 5
= 500
45-58+(-45)+(+58)-3=45-58-45+58-3=(45-45)+(58-58)-3=-3
(-57)-(-12)+3-(-57)=-57+12+3+57=(-57+57)+12+3=15
-(-24)-(-30)+(-24)-30+8=24+30-24-30+8=(24-24)+(30-30)+8=8
-(-12)+(+19)-(+12)+8-19=12+19-12+8-19=(12-12)+(19-19)+8=8
47-(-53)+(-47)-(+53)=47+53-47-53=(47-47)+(53-53)=0
-(+28)+32-(-28)+(-34)=-28+32+28-34=(-28+28)-(34-32)=-2
15-(+72)+(-15)+(+72)=15-72-15+72=(15-15)+(72-72)=0
20-(+46)+(-25)-(-46)=20-46-25+46=(20-25)+(46-46)=-5
28-(-32)+(-28)-32+5=28+32-28-32+5=(28-28)+(32-32)+5=5
-75+(-49)+(+75)+49-12=-75-49+75+49-12=(-75+75)+(49-49)-12=-12
\(...=45-58-45+58-3=-3\)
\(...=-57+12+3+57=15\)
\(...=24+30-24-30+8=8\)
\(...=12+19-12+8-19=8\)
\(...=47+53-47-53=0\)
\(...=-28+32+28-34=-2\)
\(...=15-72-15+72=0\)
\(...=20-46-25+46=-5\)
\(=...28+32-28-32+5=5\)
\(...=-75-49+75+49-12=-12\)
Ta có : 58 x 75 + 58 x 50 - 58 x 25
= 58 x ( 75 + 50 - 25 )
= 58 x 100
= 5800
a) 8x-75=5x+21
8x-5x=21+75
3x=96:3
x=32
b) 9x+25=-(2x-58)
9x+25=-2x+58
9x+2x=58-25
11x=33
x=33:11
x=3
tick mình nha
\(8x-75=5x+21\)
\(8x-5x=75+21\)
\(3x=96\)
\(x=32\)
Vậy \(x=32.\)
\(9x+25=-\left(2x-58\right)\)
\(9x+25=-2x+58\)
\(9x+2x=-25+58\)
\(11x=33\)
\(x=3\)
Vậy \(x=3.\)
\(15-\left|2x-1\right|=-8\)
\(\left|2x-1\right|=23\)
\(\Rightarrow\orbr{\begin{cases}2x-1=23\\2x-1=-23\end{cases}\Rightarrow}\orbr{\begin{cases}2x=24\\2x=-22\end{cases}}\Rightarrow\orbr{\begin{cases}x=12\\x=-11\end{cases}}\)
Vậy \(x\in\left\{12;-11\right\}\)
8x-5x=75+21
3x=96
x=32
9x+25=-2x+58
9x+2x=58-25
11x=33
x=3
\(a,8x-75=5x+21\)
\(8x-5x=21+75\)
\(3x=96\)
\(x=32\)
\(b,9x+25=-\left(2x-58\right)\)
\(9x+25=-2x+58\)
\(9x+2x=58-25\)
\(11x=33\)
\(x=3\)
\(c,\left(5-x\right).\left(x+2\right)=0\)
\(\Rightarrow\orbr{\begin{cases}5-x=0\\x+2=0\end{cases}\Rightarrow\orbr{\begin{cases}x=5\\x=-2\end{cases}}}\)
a)
\(x+4⋮x\)
\(\Rightarrow\left(x+4\right)-x⋮x\)
\(\Rightarrow4⋮x\)
\(\Rightarrow x\in\left\{1;-1;2;-2;4;-4\right\}\)
b) \(\left(75-x\right)\left(x+32\right)\left(x-58\right)=0\)
\(\Rightarrow75-x=0;x+32=0;x-58=0\)
\(\Rightarrow x=75;x=-32;x=58\)
58 x 75 + 25 x 58 - 58 x 28
= 58 x ( 75 + 25 + 28 )
= 58 x 128
= 7424
58 x 75 + 25 x 58 - 58 x 28
= 58 x (75 + 25 - 28)
= 58 x 72
= 4176