Question

please give me the solution of the question I will mark as BRAINLEIST ​

Answer 1

Answer:

let he remains present for 'x' days

and absent for'y'days

According to given condition

X+Y=30......1

120X-10y=2300......2

therefore,. Y=30-X......3

substituting eq.3 in eq.1

we get 120X-10(30-X)=2300

120X-300+10X=2300

130X=2300+300=2600

x=20

and Y=10

so he remained present for 20 days and absent for 10 days

Hope it helps