Question

уравнение. (-20х-50)•2=100

Answer 1

(-20х-50)•2=100
-40x - 100 = 100
-40 x = 100 + 100
-40 x = 200
x = - 200 / 40 
x = -5

Answer 2

(-20х-50)*2=100
-40х-100=100
-40х=100+100
-40х= 200
х= 200:(-40)
х=-5