Пошаговое объяснение:
5x-3(x-4)=7x+8
5x - 3x + 12 = 7x + 8
2x + 12 = 7x + 8
7x - 2x = 12 - 8
5x = 4
x = 4 : 5
x = 0,8
9+(6x-4)=2x+8
9 + 6x - 4 = 2x + 8
5 + 6x = 2x + 8
6x - 2x = 8 - 5
4x = 3
x = 3 : 4
x = 0,75
1)
5x-3(x-4)= 7x+8
5x-3x+12= 7x+8
5x-3x-7x= 8-12
-5x= -4
x= -4:(-5)
x=0,8
2)
9+(6x-4)=2x+8
9+6x-4= 2x+8
6x-2x= 8-9+4
4x= 3
x= 3:4
x=0,75
