👤

REZOLVATI ECUATIILE:
1)5x+52-31=30la puterea 2 -19
2)9+2(14-y)=15


Răspuns :

1)5x+52-31=30 la puterea 2-19=
5x+52-31=900-19
5x+52-31=881
5x+52=881-31
5x+52=850
x+52=850:5
x+52=170
x=170-52
x=118
2)9+2(14-y)=15
2(14-y)=15-9
14-y=6:2
14-y=3
y=3+14
y=17