Question

5 (23+ k)+15

13c-6+2-10c

Answer 1

5(23+к)+15=115+5к+15=5к+130
13с-6+2-10с=3с-4

Answer 2

по отдельному

Answer 3

5*(23+к)+15=115+5к+15=130+5к
13с-6+2-10с=3с-4