Помогите пожалуйста,даю 20 баллов,заранее спасибо*. Created by Juli69. algebra-ru

1.x+1 + 2x+1 = 2 3 5Общий знаменатель: 155(x+1)+3(2x+1)=2*155x+5+6x+3=3011x+8=3011x=30-811x=22x=2Ответ: 22.4x+9y+c=0(-5; 2)х= -5у=24*(-5)+9*2+с=0-20+18+с=0-2+с=0с=2Ответ: 23. х - 7"б" х+3 - 7"а"х+х+3=672х=67-32х=64х=32 - 7"б"32+3=35 - 7"а"Ответ: 354. {3(x-y)-2(x+y)=2x-2y { x+y - x-y = 1 - y 5 3 153(x-y)-2(x+y)=2x-2y3x-3y-2x-2y=2x-2y3x-2x-2x=-2y+3y+2y-x=3y x= -3y-3y+y - -3y-y = 1 - y 5 3 15Общий знаменатель: 153*(-2y)-5*(-4y)=15-y-6y+20y=15-y14y+y=1515y=15y=1x=-3*1= -3x₀+y₀ = -3+1 = -2/2 = -1 2 2Ответ: -15. {4x+y= -8 {5x+3y=44x+y= -8y= -4x-85x+3(-4x-8)=45x-12x-24=4-7x=4+24-7x=28x= -4y=-4*(-4) -8 = 16-8 =8т.А (-4; 8)Ответ: 8Спасибо огромное\Новые вопросы в АлгебраГеометрия помогите пожалуйстаПредставь квадрат двучлена в виде многочленавыполни умножение можно поподробнеереши уравнение можно поподробнееразложи на множителивыполни умножение можно поподробнееавтомобиль разгоняется на прямолинейном участке шоссе с постоянным ускорением a=5445 км/ч² скорость υ вычисляется по формуле υ=√2la, гле l пройденный…автомобилем путь в километрах. найдите, сколько километров проедет автомобиль к моменту, когда он разгонится до скорости 99 км/чГеометрия решите пожалуйстаРешите аожалуйста номер 3.15 алгебра 7 класс абылкасымова. 25 балловАлбебра и геометрия решите три заданияПредыдущийСледующийВместе мы знаем большеЭтот сайт использует cookies Политика Cookies . 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Помогите пожалуйста,даю 20 баллов,заранее спасибо*...

Juli69 @Juli69

July 2022 1 14 Report

Помогите пожалуйста,даю 20 баллов,заранее спасибо*

Answers & Comments

m11m 1.
x+1 + 2x+1 = 2
3 5
Общий знаменатель: 15
5(x+1)+3(2x+1)=2*15
5x+5+6x+3=30
11x+8=30
11x=30-8
11x=22
x=2
Ответ: 2

2.
4x+9y+c=0
(-5; 2)
х= -5
у=2
4*(-5)+9*2+с=0
-20+18+с=0
-2+с=0
с=2
Ответ: 2

3. х - 7"б"
х+3 - 7"а"
х+х+3=67
2х=67-3
2х=64
х=32 - 7"б"
32+3=35 - 7"а"
Ответ: 35

4. {3(x-y)-2(x+y)=2x-2y
{ x+y - x-y = 1 - y
5 3 15
3(x-y)-2(x+y)=2x-2y
3x-3y-2x-2y=2x-2y
3x-2x-2x=-2y+3y+2y
-x=3y
x= -3y

-3y+y - -3y-y = 1 - y
5 3 15
Общий знаменатель: 15
3*(-2y)-5*(-4y)=15-y
-6y+20y=15-y
14y+y=15
15y=15
y=1

x=-3*1= -3

x₀+y₀ = -3+1 = -2/2 = -1
2 2
Ответ: -1

5. {4x+y= -8
{5x+3y=4

4x+y= -8
y= -4x-8
5x+3(-4x-8)=4
5x-12x-24=4
-7x=4+24
-7x=28
x= -4
y=-4*(-4) -8 = 16-8 =8
т.А (-4; 8)
Ответ: 8

Спасибо огромное\

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