Question

Jika 3x+2y=7 dan 2x+3y=13,maka tentukan nilai dari x+y tolong pake cara ya

Answer 1

3x + 2y = 7 I x2 I 6x + 4y = 14
2x + 3y = 13 I x3 I 6x + 9y = 39
-------------------------------------------- -
================> -5y = -25
================> y = -25/-5
================> y = 5
3x + 2y = 7
3x + 2 (5) = 7
3x + 10 = 7
3x = 7 - 10
3x = -3
x = -3/3
x = -1

x + y
-1 + 5 = 4

semoga membantu dan jadikan jawaban saya yang terbaik ^_^