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\(120\)\(+\)\(80\)\(=\)\(500\)\(-\)\(x\) \(100\)\(+\)\(100\)\(=\)\(400\)\(-\)\(x\)
\(200\) \(=\)\(500\)\(-\)\(x\) \(200\) \(=\)\(400\)\(-\)\(x\)
\(500\)\(-\)\(200\)\(=\)\(x\) \(400\)\(-\)\(200\)\(=\) \(x\)
\(300\) \(=\) \(x\) \(200\) \(=\) \(x\)
x + 600 +400 = 20 x 20
x + 1000 = 400
x = 1000 - 400
x = 600
x + 600 + 400 = 20 x 20
x + 1000 = 400
x = 400 - 1000
x = - 600
Ta có: 80 ⋮ x
⇒ \(x\inƯ\left(80\right)=\left\{1;2;4;5;8;10;16;20;40;80\right\}\)
Mà: x > 20
\(\Rightarrow x\in\left\{1;2;4;5;8;10;16\right\}\)
`#3107.101107`
\(80-5\left(x-2\right)=20\\ \Rightarrow5\left(x-2\right)=80-20\\ \Rightarrow5\left(x-2\right)=60\\ \Rightarrow x-2=60\div5\\ \Rightarrow x-2=12\\ \Rightarrow x=12+2\\ \Rightarrow x=14\)
Vậy, `x = 14.`
\(80-5.\left(x-2\right)=20\)
\(=>5\left(x-2\right)=80-20\)
\(=>5\left(x-2\right)=60\)
\(=>x-2=60:5\)
\(=>x-2=12\)
\(=>x=12+2\)
\(=>x=14\)
a) 13 - ( -20 ) + x = 80 : 2
33 + x = 40
x = 40 - 33
x = 7
b) -13 + ( -20 ) + x = ( - 490 ) + 27
- 33 + x = -463
x = -463 - ( -33 )
x = -430
a) 13-(-20)+x=80:2
13+20+x=40
33+x=40
x=40-33
x=7
b) -13+(-20)+x=(-490)+27
-33+x=-463
x=-463+33
x=-430
45 - 80 -\((\)20-x\()\)= -45
45 - 80 -20 + x = -45
x = -45 -45 + 80 +20
x =10
vậy x = 10
-35 - (20 - x) = - 45
20 - x = - 35 - (-45)
20 - x = 10
x = 20 - 10
x = 10
Vậy x= 10
20 + 80 + x = 400
80 + x = 400 - 20
80 + x = 380
x = 380 - 80
x = 300
x=300