Question

Rezolvaţi ecuatiile
A) 2(x - 3) = 216
B) 5-3x=x+1
C) 280:x=155-85

Answer 1

A) 2(x-3)=216 |:2
x-3=108
x=108+3=111
B) 5-3x=x+1 |+5
3x=x+6
2x=6 => x=3
C) 280:x=155-85
280:x=70
x=280:70
x=4

Answer 2

a)2(x-3)=216
  2x-6=216
  2x=222
  x=111
b)5-3x=x+1
  x-3x=-4
  -2x=-4
   x=2
c)280:x=155-85
  280:x=70
  x=4