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100 + 200 - 4000 + 3000 + 100 - 200 + 300 = [(100+100)+(200-200)+(3000+300)]-4000
= [200+3300] -4000
= 3500-4000
= -500
ủng hộ mk nha mấy bn
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x + 100 = 200 - 300 + 100
x + 100 = -100 + 100
x + 100 = 0
x = 0 - 100
x = -100
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x + 100 = 200 - 300
x + 100 = - 100
x = 100 - 100
x = 0
x - 300 = 400 - 500
x - 300 = -100
x = -100 + 300
x = 200
k mik mik k lại
x + 100 = 200 - 300
x + 100 = -100
x = -100 - 100
x = -200
x - 300 = 400 - 500
x - 300 = -100
x = -100 + 300
x = 200
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x + 200 + 300 - 100 = 900
x + 400 = 900
x = 900 - 400
x = 500
tk mk nha mk sẽ tk lại
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100 - 200 + 30 - 7 + 27 - 100 + 300 - 20 + 30 = 160
Ủng hộ mình lên 0 điểm nha
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=400=500=600