Question

Решите систему уравнении
7(x+3y)=4x+33
5 (x-2y)=5y+5

Answer 1

7(х+3у)=4х+33=7х+21у=4х+33=7х-4х+21у=33=3х+21у=33

5(х-2у)=5у+5=5х-10у=5у+5=5х-10у-5у=5=5х-15у=5