Question

Помогите решить,пожалуйста

Answer 1

1.

3 + x/4 = 11 - x

x+x/4 = 8 (*14)

4x+x = 32

5x = 32

x = 32/5

2.

(x+9)/3 - 1 = x/5 (*15)

5x+45-15=3x

2x = -30

x = -15

3.

(2x+3)/2 = (3x-1)/5 (*10)

10x+15 = 6x-2

4x = -17

x = -17/4

4.

(7-2x)/(x+11) = -2/3

21-6x=-x-11

5x=32

x = 32/5