Someone should help me solve this...We’re are the mathematics guru.. come help me solve this please

Morningblues:
Someone should help me solve this...We’re are the mathematics guru.. come help me solve this please

16 D

17 D

18 B

19 D

20 E

In 1st set, you simply subtract 9 from 45 to get 36 and if you add the other numbers on the RHS you still get same answer

For set 2,first multiply the two digits, then add them again.
Now add their product and their sum to get the final answer

For the last set L = 4, M = 6and N=5. Substitute them where applicable, do the arithmetic.

Don't forget to say thank.

Solution D
45---------32
36
9 4
9x4=36
36-32=4
45-46= 9
(16)=D (17)=B (18)=B (19)=D (20)=E

Solution A
4 + 2 = 14 is ( 4x2 +(4+2))

(1)=B (2)=C (3)=B (4)=A (5)= D

Solution C
M=6, MxK=24, K=4, MxN=30, N=5, LxN =15, L=3
(11)=A, (12)=B (13)=C (14)=C (15)=D


For further mathematical needs/lessons (primary and secondary online or offline) you can reach me on +2348038635225 phone/WhatsApp.