selesaikan persamaan berikut x+y=2 4x+2y=7

x + y = 2
x = 2 - y

4x + 2y = 7
4(2 - y) + 2y = 7
8 - 4y + 2y = 7
2y = 7 - 8
y = -1/2

x + y = 2
x + (-1/2) = 2
x = 2 + 1/2
X = 5/2