Question

Daca x + y este egal cu 1000 si x - y egal cu 868, afla valoarea lui x si y calculeaza apoi 2 ori x - 3 ori y

Answer 1

x+y=1000
x=1000-y
x-y=868
1000-y-y=868
1000-2y=868
1000-868=2y
2y=132
y=66
x=1000-66
x=934
2*x-3*y=2*934-3*66=1868-198=1670

Answer 2

x=1000-y
1000-y-y=868
-2y=868-1000
-y=434-500
y=66=> x= 934
2x-3y= 1868-198=1670