а) 13a - 5a = 8813a - 5a = 888a = 88a = 88 / 8a = 11
б) 5z + 21z = 52026z = 520z = 520 / 26z = 20
в) f + 2f + 3f = 3366f = 336f = 336 / 6f = 56
г) 23x + 24x = 94047x = 940x = 940 / 47x = 20
д) 98z - 78z = 200020z = 2000z = 2000 / 20z = 100
е) 9i - 6i - 2i = 128i = 128
а) 13a - 5a = 88
13a - 5a = 88
8a = 88
a = 88 / 8
a = 11
б) 5z + 21z = 520
26z = 520
z = 520 / 26
z = 20
в) f + 2f + 3f = 336
6f = 336
f = 336 / 6
f = 56
г) 23x + 24x = 940
47x = 940
x = 940 / 47
x = 20
д) 98z - 78z = 2000
20z = 2000
z = 2000 / 20
z = 100
е) 9i - 6i - 2i = 128
i = 128