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sonyaeliseeva1
@sonyaeliseeva1
November 2021
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Помогите 6 класс математика даю 15 баллов
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tolikmashnikov1
Вариант 1
1.
a) 11+2x=55+3x
2x-3x=55-11
-1x=44
x=-44
б) -15-3x=-7x+45
-3x+7x=45+15
4x=60
x=15
в) -3x-17=8x-105
-3x-8x=-105+17
-11x=-88
x=8
2.
a) 2(2+y)=19-3y
4+2y=19-3y
2y+3y=19-4
5y=15
y=3
б)(4-c)+2(c-3)=-13
4-c+2c-6=-13
-c+2c=-13-4+6
c=-11
в)-3(3b+1)-12=12
-9b-3-12=12
-9b=12+3+12
-9b=27
b=-3
Вариант 2
1.
a) 11+3x=55+4x
3x-4x=55-11
-1x=44
x=-44
б)-15-4x=-8x+45
-4x+8x=45+15
4x=60
x=15
в)-8x-17=3x-105
-8x-3x=-105+17
-11x=-88
x=8
2.
a)2(y+3)=21-3y
2y+6=21-3y
2y+3y=21-6
5y=15
y=3
б)(2-с)+3(с-3)=-13
2-c+3c-9=-13
-c+3c=-13-2+9
2c=6
c=3
в) -3(1-3b)-12=12
-3+9b-12=12
9b=12+3+12
9b=27
b=3
1 votes
Thanks 2
sonyaeliseeva1
Спасибо тебе большое! Хорошо иметь такие умные мозги!
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Answers & Comments
1.
a) 11+2x=55+3x
2x-3x=55-11
-1x=44
x=-44
б) -15-3x=-7x+45
-3x+7x=45+15
4x=60
x=15
в) -3x-17=8x-105
-3x-8x=-105+17
-11x=-88
x=8
2.
a) 2(2+y)=19-3y
4+2y=19-3y
2y+3y=19-4
5y=15
y=3
б)(4-c)+2(c-3)=-13
4-c+2c-6=-13
-c+2c=-13-4+6
c=-11
в)-3(3b+1)-12=12
-9b-3-12=12
-9b=12+3+12
-9b=27
b=-3
Вариант 2
1.
a) 11+3x=55+4x
3x-4x=55-11
-1x=44
x=-44
б)-15-4x=-8x+45
-4x+8x=45+15
4x=60
x=15
в)-8x-17=3x-105
-8x-3x=-105+17
-11x=-88
x=8
2.
a)2(y+3)=21-3y
2y+6=21-3y
2y+3y=21-6
5y=15
y=3
б)(2-с)+3(с-3)=-13
2-c+3c-9=-13
-c+3c=-13-2+9
2c=6
c=3
в) -3(1-3b)-12=12
-3+9b-12=12
9b=12+3+12
9b=27
b=3