a) 145 - ( 125 + X ) = 12
125 + X = 145 - 12
125 + X = 133
X = 133 - 125
X = 8
Vậy X = 8
b) 5.( X + 12 ) + 22 = 92
5.( X + 12 ) = 92 - 22
5.( X + 12 ) = 70
X + 12 = 70 : 5
X + 12 = 14
X = 14 - 12
X = 2
Vậy X = 2
Học tốt #
a) 145-(125+x)=12
125+x=145-12
125+x=133
x=133-125
x=8
Vậy x = 8
b) 5(x+12)+22=92
5(x+12)=92-22
5(x+12)=70
x+12=70:5
x+12=14
x=14-12
x=2
Vậy x = 2
mk nha mn
\(a) 145-(125+x)=12\)
\(=> 125+x=145-12\)
\(=> 125+x=133\)
=> \(x=133-125\)
=> \(x=8\).Vậy \(x=8\)
\(b) 5(x+12)+22=92\)
\(=> 5(x+12)=92-22 \)
\(=>5(x+12)=70\)
\(=> x+12=70.5\)
\(=>x+12=350\)
\(=> x=350-12\)
\(=> x=338\).Vậy \(x=338\)
a)145-(125+x)=12
=>125+x=145-12
=>125+x=133
=>x=133-125
=.> x=8
Vậy x=8
b)5(x+12)+22=92
=>5(x+12)=92-22
=>5(x+12)=70
=>x+12=70:5
=>x+12=14
=>x=14-12
=>x=2
Vậy x=2
k cho mình nha!!!.
a)145-(125+x)=12
=>125+x =145-12
=>125+x =133
=> x =133-125
=> x =8
b)5(x+12)+22=92
=>5(x+12) =92-22
=>5(x+12) =70
=>x+12 =70 : 5
=>x+12 =14
=>x =14-12
=>x =2
a)145-(125+x)=12
=>125+x =145-12
=>125+x =133
=> x =133-125
=> x =8
b)5(x+12)+22=92
=>5(x+12) =92-22
=>5(x+12) =70
=>x+12 =70 : 5
=>x+12 =14
=>x =14-12
=>x =2
a) 145 - ( 125 + x ) = 12
125 + x = 145 - 12
125 + x = 133
x = 133 - 125
x = 8
b) 5 ( x + 12 ) + 22 = 92
5 ( x + 12 ) = 92 - 22
5 ( x + 12 ) = 70
x + 12 = 14
x = 2
a) \(145-\left(125+x\right)=12\)
\(\Rightarrow125+x=145-12\)
\(\Rightarrow125+x=133\)
\(\Rightarrow x=133-125\)
\(\Rightarrow x=8\)
Vậy x = 8
b) \(5\left(x+12\right)+22=92\)
\(\Rightarrow5\left(x+12\right)=92-22\)
\(\Rightarrow5\left(x+12\right)=70\)
\(\Rightarrow x+12=70:5\)
\(\Rightarrow x+12=14\)
\(\Rightarrow x=14-12\)
\(\Rightarrow x=2\)
Vậy x = 2
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