Question

Can anyone find any mistake ?

Answer 1

only one mistake ( 42-9b-8b = 92) /4..

( 42-9b-16b = 92)

-25b = 92-42

-25b = 50

b = 50/-25

b = -2....

put in eq. (1) that b = -2.

4a +3(-2) = 14

4a - 6 = 14

4a = 14+6

4a = 20

a = 20/4

a = 5...

hope its help you..... ✌✌