а) -3(x-2.5)=9-3x + 7.5 = 9-3x = 1.5x = -0.5
б) (3x-1)×5-(2-x)×2=815x - 5 - 4 + 2x = 817x - 9 = 817x = 17x = 1
в) 5-8(x-1)=95 - 8x + 8 = 9-8x + 13 = 9-8x = -4x = 0.5
а) -3(x-2.5)=9
-3x + 7.5 = 9
-3x = 1.5
x = -0.5
б) (3x-1)×5-(2-x)×2=8
15x - 5 - 4 + 2x = 8
17x - 9 = 8
17x = 17
x = 1
в) 5-8(x-1)=9
5 - 8x + 8 = 9
-8x + 13 = 9
-8x = -4
x = 0.5