x + 100 =500
200 + x = 400
tìm x biết
x+ 100 = 100 + 100 x 2 + 400
x + 100 = 100 + 100 x 2 + 400
x + 100 = 100 + 200 + 400
x + 100 = 700
x = 700 - 100
x = 600
Vậy x = 600
x+100=100+100x2 +400
x+100=100+200+400
x+100= 300+400
x+100=700
x =700-100
x =600
Vay x = 600
x + 100 = 100 + 100 x 2 + 400
x + 100 = 100 + 200 + 400
x + 100 = 700
x = 700 - 100
x = 600
Vậy x = 600
100 x 3 + 400 . . . 100 +200 + 100 x 4
100 x 3 + 400 ... 100 + 200 + 100 x 4
= 100 x 3 + 400 = 700
= 100 + 200 + 100 x 4 = 700
=> 100 x 3 + 400 = 100 + 200 + 100 x 4
500 + x = 100 + 500
300 - x = 300 + 200
400 - x = 200 + 400
500 + x = 100 + 500
500 + x = 600
x = 600 - 500
x = 1001
300 - x = 300 + 200
300 - x = 500
x = 300 - 500
x = -200
400 - x = 200 + 400
400 - x = 600
x = 400 - 600
x = -200
k mk nha mk k l
ại ^_^
500 + 100 = 100 + 500
300 + 200 = 300 + 200
400 + 200 = 200 + 400
500+x=100+500
vay x =100
300-x=300+200
vay x= - 200
400-x=200+400
vay x= -200
a) x + 300 = 400 - 100
b) x + 600 = 400 + 600
Tìm x
a) x + 300 = 400 - 100
x + 300 = 300
x = 300 - 300
x = 0
b) x - 600 = 400 + 600
x - 600 = 1000
x = 1000 - 600
x = 400
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a) x + 300 = 400 - 100
x + 300 = 300
x = 300 - 300
x = 0
b) x - 600 = 400 + 600
x - 600 = 1000
x = 1000 - 600
x = 400
x+300=400-100
x+300=300
x=300-300
x=0
x-600=400+600
x-600=1000
x=1000+600
x=1600
Tìm x :
120 + 80 = 500 - x
100 + 100 = 400 - x
\(120\)\(+\)\(80\)\(=\)\(500\)\(-\)\(x\) \(100\)\(+\)\(100\)\(=\)\(400\)\(-\)\(x\)
\(200\) \(=\)\(500\)\(-\)\(x\) \(200\) \(=\)\(400\)\(-\)\(x\)
\(500\)\(-\)\(200\)\(=\)\(x\) \(400\)\(-\)\(200\)\(=\) \(x\)
\(300\) \(=\) \(x\) \(200\) \(=\) \(x\)
120 + 80 = 500 - x
200 = 500 - x
x = 300
100 + 100 = 400 - x
200 = 400 - x
x = 200
120 + 80 = 500 - x
100 + 100 = 400 - x
Ta có :
120 + 80 = 500 - x
=> 500 - x = 200
=> x = 300
Lại có :
100+100=400-x
=> 400-x = 200
=> x = 200
x-100=200+900
x+100=300-400
x - 100 = 200 + 900
x - 100 = 1100
x = 1100 + 100
x = 1200
x + 100 = 300 - 400
x + 100 = - 100
x = - 100 - 100
x = - 200
x+100=200+900
x+100=1000
x=1000-100
x=900
x+100=300-400
x+100=-100
x=-100-100
x=-200
X-100=200+900
X-100=1100
X =1100+100
X =1200
b) 200 x 4 = ...... 300 x 2 = ......
200 x 2 = ...... 300 x 3 = ......
400 x 2 = ...... 500 x 1 = ......
100 x 4 = ...... 100 x 3 = ......
b) 200 x 4 = .800..... 300 x 2 = ..600....
200 x 2 = .400..... 300 x 3 = ...900...
400 x 2 = ...800... 500 x 1 = ..500....
100 x 4 = ..400.... 100 x 3 = .300.....
x + 100 = 400 - 100
x + 100 = 400 - 100
x + 100 = 300
x = 300 - 100
x = 200
Vậy x = 200
Tk mk đi
Mk tk lại
x + 100 = 400 - 100
=> x + 100 = 300
=> x = 300 -100
=> x = 200
Vậy x = 200
x+ 100 = 400 - 100
x+ 100 = 300
x = 300-100
x= 200
h nha
x-300=400-100-100
x - 300 = 400 - 100 - 100
x - 300 = 200
x = 200 + 300
x = 500.
x+100=200-400+100
x + 100 = 200 - 400 + 100
x + 100 = -100
x = -100 - 100
x = -200
x+100=200-400+100
x+100=-200+100
x+100=-100
x=-100-100
x=-200
\(x+100=200-400+100\)
\(x+100=-200+100\)
\(x+100=-100\)
\(x=-100-100\)
\(x=-200\)