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ermakgalya
@ermakgalya
August 2022
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Помогите пожалуйста.
Найдите корень уравнение :
а) ( х + 2 ) + х = 9 ; в) х + 2х -5 = 40 ;
б) х + ( 7 + х ) = 11; г ) х + ( 4 + х ) + х = 16
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Настюшка123456789101
А)(x+2)+x=9
x+2+x=9
2x+2=9
2x=9-2
2x=7
x=7:2
x=3,5
б)x+2x-5=40
3x-5=40
3x=40+5
3x=45
x=45:3
x=15
в)x+(7+x)=11
x+7+x=11
2x+7=11
2x=11-7
2x=4
x=4:2
x=2
г)x+(4+x)+x=16
x+4+x+x=16
3x+4=16
3x=16-4
3x=12
x=12:3
x=4
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Answers & Comments
x+2+x=9
2x+2=9
2x=9-2
2x=7
x=7:2
x=3,5
б)x+2x-5=40
3x-5=40
3x=40+5
3x=45
x=45:3
x=15
в)x+(7+x)=11
x+7+x=11
2x+7=11
2x=11-7
2x=4
x=4:2
x=2
г)x+(4+x)+x=16
x+4+x+x=16
3x+4=16
3x=16-4
3x=12
x=12:3
x=4