8.7 y-4.5 y=10.5 kak reshat

Question

8.7 y-4.5 y=10.5 kak reshat

Answer 1

8.7у-4.5у=10.5 4.2у=10.5 У=10.5÷4.2 У=2.5

Answer 2

8,7у-4,5у=10,5
4,2у=10,5
у=10,5:4,2
у=2,5