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a fost răspuns

afla numerele necunoscute 25+a:(20+4x28-4)=39 .d-2x(480x2-90:10)+5=75 .52x5+b=124x3+25x4 .20+3x12+c=148

Răspuns :

RPK129
25+a:(20+112-4)=39
=25+a:128=39=
25+a=128x39=
a=4992-25=
a=4967
V.4992:128=39.
2.d-2x(960-9)+5=75
d-2x951+5=
d=1902+5=
d=1907+75=
d=1982
V.1982-1907=75
3.52x5+b=124x3+25x4=
=260+b=372+100=
=260+b=472=
b=472-260=
b=212
V.260+212=472
4.20+3x12+c=148=
=20+36+c=148=
=56+c=148=
c=148-56=
c=92
Sper ca te-am ajutat