Diketahui sistem persamaan 2/x + 3/y = 1/3 dan 2/x – 3y = -1 nilai x + y = ….
Jawab:
2/x = a
3/y = b
a + b = 1/3
a – b = – 1
(+) —> 2a = - 2/3
a = -1/3 –> x = -3
a + b = 1/3
b = 1/3 – a
b = 2/3 —> y = 3/2
x+ y = - 3 + 3/2 = – 3/2
Diketahui sistem persamaan 2/x + 3/y = 1/3 dan 2/x – 3y = -1 nilai x + y = ….
Jawab:
2/x = a
3/y = b
a + b = 1/3
a – b = – 1
(+) —> 2a = - 2/3
a = -1/3 –> x = -3
a + b = 1/3
b = 1/3 – a
b = 2/3 —> y = 3/2
x+ y = - 3 + 3/2 = – 3/2