X-(23+17)=60 70-a=8+9+2

Question

X-(23+17)=60 70-a=8+9+2

Answer 1

1)
х - (23 + 17) = 60
х - 40 = 60
х = 60 + 40
х = 100
проверка:
100 - (23 + 17) = 60
100 - 40 = 60
60 = 60

2)
70 - а = 8 + 9 + 2
70 - а = 19
а = 70 - 19
а = 51
проверка:
70 - 51 = 8 + 9 + 2
19 = 19