Решите уравнение: а) 2х - (6х+1)=9 б) 4(1-5х)=9-3(6х-5)

Question

Решите уравнение:
а) 2х - (6х+1)=9 б) 4(1-5х)=9-3(6х-5)

Answer 1

A)2x-6x-1=9
-4x=10
x=-10/4
x=-2,5
б)4-20x=9-18x+15
-20x+18x=9+15-4
-2x=20
x=-10

Answer 2

А) 2х - (6х+1)=9
2х - 6х - 1 = 9
-4х = 10
х = - 10/4
х = - 2.5

б) 4(1-5х)=9-3(6х-5)
4 - 20х = 9 - 18х + 15
20х - 18х = 4 - 9 - 15
2х = -20
х = -10