7(-3(m - 2) – m) – 12 = 4(5 – 3m) - 4

Question

7(-3(m - 2) – m) – 12 = 4(5 – 3m) - 4

Answer 1

7(-3m+6-m)-12=20-12m-4
-21m+42-7m-12=20-12m-4
-21m-7m+12m=20-4+12-42
-16m=-14 |:(-16)
m=14/16=7/8
m=0.875
Ответ: 0,875

Answer 2

7(-3m+6-m)-12=20-12m-4
-21m+42-7m-12=20-12m-4
-21m-7m+12m=20-4-42+12
-16m=-14
m=0,875