Question

Rezolvati in multimea numerelor naturale ecuatiile:
a) 2x+7=43+x
b)84:(x-3)=12
c) 3*(4+5x)=72

Multumesc anticipat :)

Answer 1

a) 2x+7=43+x 
2x-x=43-7
x=36

b)84:(x-3)=12
x-3=84:12
x-3=7
x=7+3
x=10

c) 3*(4+5x)=72
12+15x=72
15x=72-12
15x=60
x=60:15
x=4

Answer 2

a)2x-x=43-7
   x=36
b)x-3=84:12
   x-3=7
   x=10
c)12+15x=72
   15x=72-12
   15x=60
   x=4