Complete the postcard to your Mum (brother or friend) and write what the weather is like at the seaside. Fill in the words from the box.

Х-у=8         ⇒у=х-8
5у-3х=4

5*(х-8)-3х=4
5х-40-3х=4
2х=44
х=22
у=22-8=14

проверка
22-14=8
5*14-3*22=70-66=4