Question

8 (3a - d) - 4 (a-7b)
Как решить?
10-2(3x +5) =4 (x - 2)

Answer 1

8(3а -d) - 4(a-7b) = 24a - 8d - 4a + 28b = 20a -8d + 28b

10 - 2(3x + 5) = 4(x - 2)
10 - 6x - 10 = 4x - 8
-6x -4x = -8 
-10x = -8
x = 8/10 = 4/5