Question

Помогите!
Реши уравнение.
1) 6 (2x-5) - 7 (x-2) = 4
2) 3 (5x + 2) = 12 - 4 (3-4x)
3) x-3 (1-x) = 5-2 (3-2x)

4) 5/2x+1 = 3/2x-1
p.s: / - дробь

Answer 1

1)12x-30-7x+14-4=0
5x=20
x=4
2)15x+6-12+12-16x=0
-x=-6
x=6