Question

21x – 3 = 6x + 8(0,5 + x)
x =
2,5(3x – 1) = 6x + 0,5
x =

помогите плиз

Answer 1

21x – 3 = 6x + 8(0,5 + x)

21x – 3 = 6x + 4 + 8x

21x – 6x – 8x = 4 + 3

7x = 7

x = 7/7 = 1

2,5(3x – 1) = 6x + 0,5

7,5x – 2,5 = 6x + 0,5

7,5x – 6x = 0,5 + 2,5

1,5x = 3

x = 3/1,5 = 2