Question

решите уравнения и выполните проверку : а) (x-87)-27=36 б) 87 - (41+у)=22

Answer 1

 а)
(x-87)-27=36
x-87-27=36
x-114=36
x=36+114
x=150
--------------------
(150-87)-27=36
63-27=36
36=36

б)
87 - (41+у)=22
87-41-y=22
46-y=22
y=46-22
y=24
--------------
87-(41+24)=22
87-65=22
22=22