i’m almost done solving this problem but idk what to do next

[dull viper]

I mean since you found coefficients x1, x2 and x3 that means there is a linear combination. You could test it out by plugging x1, x2 and x3 in and see if b comes actually out.

Additionally, if a1, a2 and a3 are linearly independent, which seems to be the case according to your calculations, then they span R³ and there must exist one unique linear combination for b.

[mystic pond]

ok i’m gonna plug it into the equation thank you!!