Answer:
The formation of the equation is odd, but I assume it's supposed to be:
4k - 10k = -8k
-6k = -8k
-6k + 8k = -8k + 8k
2k = 0
= 
k = 0
If you want it to be y=mx+b form then the equations should look like this: y=x+5 and y=-1/3x+1.
A(x + b) = c
x+b = c / A
x = c/A - b
Hope this helps!
Answer:
the sum deposited was 6000
Step-by-step explanation:
let the sum deposited be p
now we know,
P = (Simple interest × 100 ) / ( rate × time )
- p = 900×100 / ( 5 × 3 )
- p = 90000 / 15
- p = 6000
so the sum deposited was Rs. 6000