Реши уравнения: 240-(90+х)=80

Question

Реши уравнения: 240-(90+х)=80

Answer 1

240 - ( 90 + x ) = 80
90 + Х = 240 - 80
Х = 160 - 90
Х = 70

Answer 2

[90+x]=240-80
 
[90+x]=160

x=90+80
x=160