Question

u+5a = 4 equation - 1
u+ 9a = 12 equation - 2
Then find u and a with step by step explanation
DON'T SPAM​

Answer 1

Answer:

a=2 and u=-6

Explanation:

u+5a=4 - 1 eq

u+9a=12- 2eq

1-2 eq

u+5a-u-9a=4-12

-4a=-8

a=2

Put a value in 1 eq

u+5*2=4

u=4-10

u=-6