Question

va rog e pt maine ! dau coroana !

1) 252/6+(435+14+129*3)=

2) a-(612/3+1228/4-1000:5*2)=278

3) [(a+5)*5+5]*5+5=1400:5

Answer 1

1)252:6+(435+14+129x3)=
42+(449+387)=
42+836=878

2)a-(612:3+1228:4-1000:5x2)=278
a-(204+307-200x2)=278
a-(511-400)=278
a-111=278
a=278+111
a=389

3)[(a+5)x5+5]x5+5=1400:5
[(a+5)x5+5]x5+5=280
[(a+5)x5+5]x5=280-5
[(a+5)x5+5]x5=275
(a+5)x5+5=275:5
(a+5)x5+5=55
(a+5)x5=55-5
(a+5)x5=50
a+5=50:5
a+5=10
a=10-5
a=5