Question

Решите уравнение. Срочно! 2 969-(10*х-20)=13 ( 13 в квадрате )

Answer 1

$969-(10x-20)=13^2\\ 969-(10x-20)=169\\ -(10x-20)=169-969\\ -10x+20=-800\\ -10x=-800-20\\ -10x=-820 | : (-10)\\ x=82$

Answer 2

969-10х-20=169
-10х-20=169-969
-10х-20=-800
-х=-80 (-1)
х=80