Question

Tentukan himpunan penyelesaian setiap sistem persamaan dari x+y=5 dan x-y=2

Answer 1

X+y = 5
x-y = 2 ---> x = 2+y
x+y = 5
2+y+y = 5
2+2y = 5
2y = 5-2
2y = 3
y = 3/2

x = 2+y
x = 2+3/2
x = 4/2+3/2
x = 7/2