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3X +4=5X -12 ????????????


Răspuns :

3X +4=5X -12
4+12=5x-3x
16=2x
x=16:2
x=8
3X+4=5X-12
4+12=5X-3X
4+12=2X
2X=16
X=16:2
X=8



VERIFICARE :
3×8+4=5×8-12
24+4=40-12
28=28



Răspuns : X=8



SUCCES !