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