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lomon2222
@lomon2222
August 2022
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1) -(a+2)+2(4-3a) Упростить
2)-4(-2,5-2x)+2(-1,8+1) Упростить
3)2x-3=5-3x Уравнение
4)4(-3,5+3x)=-3+10x Уравнение
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jekadva
Verified answer
1) -(a+2)+2(4-3a) =-a-2+8-6a=-7a+6
2)-4(-2,5-2x)+2(-1,8+1) =10+8x-3,6+2=8x+8,4
3)
2x-3=5-3x
2x+3x=5+3
5x=8
x=8:5
x=1,6
4)
4(-3,5+3x)=-3+10x
-14+12x=-3+10x
12x-10x=-3+14
2x=11
2x=11:2
x=5,5
3 votes
Thanks 2
KnowledgePower
Исправьте у себя ошибку!-4(-2,5-2x)+2(-1,8+1) =10+8x-3,6x+2=12+4,6x. "3,6x" - в условии "-1,8" без x дано!
KnowledgePower
Verified answer
1)
-(a+2)+2(4-3a) = -a-2+8-6a =
-7a+6
2)
-4(-2,5-2x)+2(-1,8+1) = 10 + 8x - 3,6 + 2 =
8,4 + 8x
3)
2x-3=5-3x
5x = 8
x = 1,6
4)
4(-3,5+3x)=-3+10x
-14 + 12x = -3 + 10x
-11 = -2x
x = 5,5
2 votes
Thanks 1
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Answers & Comments
Verified answer
1) -(a+2)+2(4-3a) =-a-2+8-6a=-7a+62)-4(-2,5-2x)+2(-1,8+1) =10+8x-3,6+2=8x+8,4
3)
2x-3=5-3x
2x+3x=5+3
5x=8
x=8:5
x=1,6
4)
4(-3,5+3x)=-3+10x
-14+12x=-3+10x
12x-10x=-3+14
2x=11
2x=11:2
x=5,5
Verified answer
1) -(a+2)+2(4-3a) = -a-2+8-6a = -7a+62) -4(-2,5-2x)+2(-1,8+1) = 10 + 8x - 3,6 + 2 = 8,4 + 8x
3) 2x-3=5-3x
5x = 8
x = 1,6
4) 4(-3,5+3x)=-3+10x
-14 + 12x = -3 + 10x
-11 = -2x
x = 5,5