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Hello, @Alex89! I don't know exactly why this is failing. I even try using Sympy as solver for the problem, but my computer crashed (in SageCell, I got a "Memory Error"). However, you can cleverly solve this system. Check this out:

Let's make a change of variables, making $x=\log_10(a2)$ and $y=\log_10(b2)$ . Then, your code can be rewritten as

var('a2,b2')
solve([x + 435*y == 50.88, 435*x + 8555*y == 979.15], x, y)

That gives the following solution:

[[x == (-921/17800), y == (60439/516200)]]

This implies that $\log_10(a2)=-921/17800$ and $\log_10(b2)=60439/516200$ . Now, if you apply the definition of the logarithm, these in turn imply that $a2=10^{-921/17800}$ and $b2=10^{60439/516200}$ . If you want these values as numerical values, you do

a2 = N(10^(-921/17800))
b2 = N(10^(60439/516200))

which gives you

a2 = 0.887684071389383
b2 = 1.30943656287307

That's it! I hope this helps!

Let's make a change of variables, making $x=\log_10(a2)$ and $y=\log_10(b2)$ . Then, your code can be rewritten as

var('a2,b2')
solve([x + 435*y == 50.88, 435*x + 8555*y == 979.15], x, y)

That gives the following solution:

[[x == (-921/17800), y == (60439/516200)]]

This implies that ~~$\log_10(a2)=-921/17800$~~ $\log_{10}(a2)=-921/17800$ and ~~$\log_10(b2)=60439/516200$ .~~ $\log_{10}(b2)=60439/516200$ . Now, if you apply the definition of the logarithm, these in turn imply that $a2=10^{-921/17800}$ and $b2=10^{60439/516200}$ . If you want these values as numerical values, you do

a2 = N(10^(-921/17800))
b2 = N(10^(60439/516200))

which gives you

a2 = 0.887684071389383
b2 = 1.30943656287307

That's it! I hope this helps!