What is symmetric property of equality? what is the answer to this problem?

With #! i’ve tried to figure it out but i can’t.

Find the value of 1715⋅211.though these numbers aren't quite as nice as the ones from the example or the previous part, the procedure is the same, so this is really no more difficult. give the numerator followed by the denominator, separated by a comma.

Solve 2x+y=3 x+y=5 in substitution method