Question

Rezolvați ecuațiile:
a)2x+1=13-x
b)x+9=7-x
c)2+4x=2x+6
d)3x-8=5x+10
e)x+1+2x=15+4x
f)-2x+3=x+8+2x

Answer 1

a. 2x+1=13-x=> 2x+x=13-1
3x=12 => x=4
b.x+9=7-x=>x+x=7-9
2x=-2=>x=-1
c.2+4x=2x+6=>  4x-2x=6-2
2x=4 =>x=2
d.3x-8=5x+10=> 3x-5x=10+8
-2x=18=>x=-9
e. x+1+2x=15+4x=>3x+1=15+4x
3x-4x=15-1
-x=14=>x=-14
f. -2x+3x=x+8+2x
x=3x+8
-2x=8
x=-4

Answer 2

a)2x+x=13-1
3x=12
x=4
b)x+x=7-9
2x= -2
x= -1
c)4x-2x=6-2
2x=4
x=2
d)3x-5x=10-8
-2x=2
x= -1
e)x+2x-4x=15-1
-x=14, x= -14
f) -2x-x-2x=8-3
-5x=5
x= -1