Question

using cross multiplication method 27x + 31y = 85 ; 31x+27y =89

Answer 1

$27x + 31y = 85 \times 31\\ 31x + 27y = 89 \times 27 \\ 27x \times 31 + 31y \times 31 = 85 \times 31 \\ 31x \times 27 + 27y \times 27 = 89 \times 27 \\ 837x + 961y = 2635 \\ 837 x + 729y = 2403 \\ 229y = 232 \\ y = 232 \div 229 \\ y = 1.013 \\ \\ now \: put \: it \: 1st \: equation \\ 27x + 31(1.013) = 85 \\ 27x = 85 - (31.406) \\ 27x = 49.594 \\ x = 49.594 \div 27 \\ x = 79.836$

I hope u get this