Решите уравнение 1)6m-19=3m+8 2)10x+4=5x+19 3)7m-1=9m+4 4)8m+7=13m+12 5)-9x+8=x=14 6)21y-5=20y-12
Ответ:
Пошаговое объяснение:
1) 6m – 19 = 3m + 8
6m – 3m =8 + 19
3m = 27
m = 27 : 3
m = 9
2) 10x + 4 = 5x + 19
10x - 5x = 19 – 4
5x = 15
x = 15 : 5
x = 3
3) 7m – 1 = 9m + 4
7m – 9m = 4 +1
-2m = 5
m = 5 : (-2)
m = -2,5
4) 8m + 7 = 13m + 12
8m – 13m = 12 – 7
-5m = 5
m = 5 : (-5)
m = -1
5) -9x + 8 = x – 14
-9x - х = -14 – 8
-10х = -22
х = -22 : (-10)
х = 2,2
6) 21y – 5 = 20y - 12
21у – 20у = 5 – 12
у = -7