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140120051
@140120051
August 2022
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упростите выражения и найдите его значения (5х-1)-(2-8х)при х=0,75, (6-2х)+(15-3х)при х=-0,2
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prettypushkova
Verified answer
(5х - 1) - (2 - 8х) = 5х - 1 - 2 + 8х = 13х - 3
при х = 0,75
13 * 0,75 - 3 = 9,75 - 3 = 6,75
Ответ: 6,75.
(6 - 2х) + (15 - 3х) = 6 - 2х + 15 - 3х = - 5х + 21
при х = - 0,2
- 5 * (-0,2) + 21 = 1 + 21 = 22
Ответ: 22.
20 votes
Thanks 37
Fixytup
Verified answer
1) (5x-1)-(2-8x)=5x-1-2+8x=13x-3
x=0,75
13*0,75-3=9,75-3=6,75
2) (6-2x)+(15-3x)=6-2x+15-3x=-5x+21
x=-0,2
-5*(-0,2)+21=1+21=22
13 votes
Thanks 14
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Answers & Comments
Verified answer
(5х - 1) - (2 - 8х) = 5х - 1 - 2 + 8х = 13х - 3при х = 0,75
13 * 0,75 - 3 = 9,75 - 3 = 6,75
Ответ: 6,75.
(6 - 2х) + (15 - 3х) = 6 - 2х + 15 - 3х = - 5х + 21
при х = - 0,2
- 5 * (-0,2) + 21 = 1 + 21 = 22
Ответ: 22.
Verified answer
1) (5x-1)-(2-8x)=5x-1-2+8x=13x-3x=0,75
13*0,75-3=9,75-3=6,75
2) (6-2x)+(15-3x)=6-2x+15-3x=-5x+21
x=-0,2
-5*(-0,2)+21=1+21=22