1) 4х-3(х-4)=5х-12 2)8х-7+3-21=х+10. 3)2(х-8)=7(х-1) Помогите , пожалуйста?
1) 4x -3(х-4)=5х-12
4x -3x +12 = 5x - 12
-4x= -24
x = 6
2) 8х-7+3-21=х+10
7x= 35
x = 5
3) 2(х-8)=7(х-1)
2x-16 = 7x - 7
-5x = 9
x = -9/5