Question

daca x+y=1000 si x-y=868, afla valoarea lui x si y . calculeaza apoi 2xX-3xY.

Answer 1

1000-868=132
132:2=66
x=868+66=934
y=666
2x-3y=
2x934-3x66=
1868-198=1670

Answer 2

x-y=868
x=868+y

x+y=1000
868+y+y=1000
2y=132
y=66
x=868+66
x=934

Nu prea inteleg ce inseamna 2xX-3xY dar incerc sa rezolv ce scrie
2*934*934-3*934*66=
=1744712-184932
=1559780