Question

найдите корень уравнения (7х+1)-(9х+3)=5 3.4+2y=7(y-2.3)

Answer 1

(7х+1)-(9х+3)=5
7х+1-9х-3=5
7х-9х=5-1+3
-2х=7
х=-3.5

3.4+2у=7(у-2.3)
3.4+2у=7у-16.1
2-7у=-16.1-3.4
-5у=12.7
у=-12.7/5