Question

39-7+17=3y+16;
в) 2(½ - 6) - 3у = 4y - y; д) 5,6x - 6 + 1,4x = 2,5(x - 1);
6) 15-6x = 2x - 5x - 3;
「) 2(x+1,3)-2=X-3;
e) -0,3(3 - x) = 0,3x + 0,3 (5x + 2);
Нужно срочно! Даю 40баллов!

Answer 1

а) 39 - 7 + 17 = 3y + 16

49 = 3y + 16

3y = 49 - 16

3y = 33

y = 11

в) 2(1/2 - 6) - 3у = 4y - y

2(-11.5) - 3у = 3y

-23 - 3у = 3y

-23 = 6y

y = -23/6

д) 5.6x - 6 + 1.4x = 2.5(x - 1)

7x - 6 = 2.5x - 2.5

4.5x = 3.5

x = 3.5/4.5 = 7/9

Б) 15 - 6x = 2x - 5x - 3

15 - 6x = -3x - 3

15 = 3x - 3

18 = 3x

x = 6

г) 2(x + 1.3) - 2 = x - 3

2x + 2.6 - 2 = x - 3

2x = x - 0.4

x = -0.4

e) -0.3(3 - x) = 0.3x + 0.3(5x + 2)

-0.9 + 0.3x = 0.3x + 1.5x + 0.6

-0.9 = 1.8x + 0.6

-1.5 = 1.8x

x = -5/6