Question

х-2y=1
3 в степени x-3y=27

Answer 1

х=1+2у
3^1+2у-3у=27(^-степень)
3^1-у=27
3^1-у=3^3
1-у=3
у=-2
х=-3

Answer 2

х=1+2•(-2), х=1-4, х=-3

Answer 3

х=1+2*(-2).х=1+(-4)=-3