👤
a fost răspuns

Va rog urgent mate clasa a v a rezolvati ecuatiile a)5x+12=3x+20 b) 2(x+3)=x+14 c) x+5+2(x-1)=x+19 d)3(x+2)+3=2x+10

Răspuns :

Uionutalin
a) 5x+12=3x+20
    5x-3x=20-12
    2x=8
    x=8:2
    x=4

b) 2(x+3)=x+14
    2x+6=x+14
    2x-x=14-6
    x=8

c) x+5+2(x-1)=x+19
    x+5+2x-2=x+19
    3x+3=x+19
    3x-x=19-3
    2x=16
    x=16:2
    x=8

d) 3(x+2)+3=2x+10
    3x+6+3=2x+10
    3x+9=2x+10
    3x-2x=10-9
    x=1

Sper ca te-am ajutat.
5x+12=3x+20
5x-3x=20-12
2x=8
x=4
b)2x+6=x+14
2x-x=14-6
x=8
c)x+5+2x-2=x+19
2x=19-5+2
2x=16
x=8
d)3x+6+3=2x+10
3x-2x=10-6-3
x=1

Alte intrebari