Question

решите систему уровнений {4х-у =4 {16х+3у=2

Answer 1

{у=4х-4; {у=4х-4;

{16х+3у=2;{16х+3х(4х-4)=2;16х+12х-12х=2;
16х=2;х=16:2;х=8.}
{у=4х8-4;у=28.}