a+b+c=298
a-x=48 =>a=48+x
b-x=56 =>b=56+x
c-x=50 =>c=50+x
48+x+56+x+50+x=298
3×x+154=298
3×x=298-154
3×x=144
x=144:3
x=48
a=48+x
a=48+48
a=96
b=56+x
b=56+48
b=104
c=50+x
c=50+48
c=98
proba
96+104+98=200+98=298 ( Adevarat )
metoda grafica
a+b+c=298
a-x=48 =>a=48+x
b-x=56 =>b=56+x
c-x=50 =>c=50+x
a) |----| +48
b) |----| +56
c) |----| +50 } acolada toate trei 298
48+56+50=154
298-154=144
144:3=48 ( x)
48+48=96 (a)
48+56=104 ( b)
48+50=98 ( c)
