Question

how to substitute the given two unequal equations to get the variables value

Answer 1

very easy take 0 1 and substitute and the answers ready

Answer 2

you have to consider those two equations and solve them to get them. now, consider 15a1+5a0=204 as eqn (1) and 55a1+15a0=748 as eqn (2)
now you have to eliminate a variable to get the value of them. so, let's eliminate a0 from here
subtract eqn (1) by multiplying it by 3 from eqn (2) i.e., eqn(2)-3×eqn(1)=> +55a1+5a0 = 748
-(45a1+15a0) = -612 or
(55a1+15a0)-(45a1+15a0)=748-612
=>10a1=136
=>a1=13.6
substitute a1 value in eqn (1) =>15 (13.6)+5a0=204
=>5a0=0 =>a0=0
Therefore a1=13.6 and a0=0
Hope this helps you. please mark as brainliest :)