ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО

Question

ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО

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Answer 1

2.41
1) (3.2x-1.8)-(5.2x+3.4) = -5.8
3.2x-1.8-5.2x-3.4 = -5.8
-2x-5.2 = -5.8
-2x = -0.6
x = 0.3

2) 1-(0.5y-15.8) = 12.8-0.7y
1-0.5y+15.8 = 12.8-0.7y
16.8-0.5y = 12.8-0.7y
-0.5t+0.7y = 12.8-16.8
0.2y = -4
y = -20

3) 3.8-1.5x+(4.5x-0.8) = 2.4x+3
3.8-1.5x+4.5x-0.8 = 2.4x+3
3+3x = 2.4x+3
3x = 2.4x
0.6x = 0
x = 0

4) 3.5y+0.8 = 5.5y-(1.2y+0.8)-2.4
3.5y+0.8 = 5.5y-1.2y-0.8-2.4
3.5y+0.8 = 4.3y-3.2
3.5y-4.3y = -3.2-0.8
-0.8x = -4
x = 5

2.42
1) (5x-3a)-(2x+5a) = 4a
5x-3a-2x-5a = 4a
3x-8a = 4a
3x = 12a
x = 4a

2) (x+5m)-(3m-2x) = 17m
x+5m-3m+2x = 17m
3x+2m = 17m
3x = 15m
x = 5m

3) 4x-(3p-x)+(8x-5p) = 5p
4x-3p+x+8x-5p = 5p
13x-8p = 5p
13x = 13p
x = p

4) (x+b)+(x+2b)-(x-3b) = 8b
x+b+x+2b-x+3b = 8b
x+6b = 8b
x = 2b

5) x²-(x+c)-(x²-2x-3c) = 0
x²-x-c-x²+2x+3c = 0
x+2c = 0
x = -2c

6) (6x-4n)-(2x²+x)+(2x²-n) = 0
6x-4n-2x²-x+2x²-n = 0
5x-5n = 0
5x = 5n
x = n

Comments

Спасибо большое за ответ

Answer 2

(5х-3а)-(2х+5а)=4а - раскрытие скобок
5х-3а-2х-5а=4а - переносим х в одну сторону, всё остальные в другую
5х-2х=4а+3а+5а
3х=12а
x=(12/3)a
х=4а

(х+5m)-(3m-2x)=17m
х+5m-3m+2x=17m
x+2x=17m-5m+3m
3x=15m
x=(15/3)m
x=5m

4x-(3p-x)+(8x-5p)=5p
4x-3p+x+8x-5p=5p
4x+x+8x=5p+3p+5p
13x=13p
x=(13/13)p
x=p

(x+b)+(x+2b)-(x-3b)=8b
x+b+x+2b-x+3b=8b
x+x-x=8b-b-2b-3b
x=2b

x²-(x+c)-(x²-2x-3c)=0
x^2-x-c-x^2+2x+3c=0
x^2-x^2-x+2x-c+3c=0
x+2c=0
x=-2c

(6x-4n)-(2x²+x)+(2x²-n)=0
6x-4n-2x^2-x+2x^2-n=0
2x^2-2x^2+6x-x-4n-n=0
5x-5n=0
5x=5n
x=5n/5
x=n