1) 18(у+1) - 12(у+1) = 36
6(у+1) = 36
у+1 = 36/6
у+1 = 6
у+1 = 6-1
у = 5
2) (к+5)7-54=(к+5)4
7(к+5)-4(к+5) = 54
3(к+5) = 54
к+5 = 54/3
к+5 = 18
к = 18-5
к = 13
1) 18(у+1) - 12(у+1) = 36
6(у+1) = 36
у+1 = 36/6
у+1 = 6
у+1 = 6-1
у = 5
2) (к+5)7-54=(к+5)4
7(к+5)-4(к+5) = 54
3(к+5) = 54
к+5 = 54/3
к+5 = 18
к = 18-5
к = 13