Question

Diketahui sistem persamaan linear 2x+3y=26 dan 3x+4y=37.Nilai xy adalah... pake cara

Answer 1

2x +3y=26---------x3---------6x +9y = 78
3x+4y = 37---------x2--------6x + 8y = 74        -
-----------------                      _______________
                                                   y = 4

2x + 3y =26
2x + 3(4) = 26
2x = 26 - 12
2x = 14
x = 7

Answer 2

2x+3y=26 |×3| 6x+9y=78
3x+4y=37 |×2| 6x+8y=74
-
y= 4
2x+3y=26
2x+3(4)=26
2x =26-12
x = 14/2
x = 7
Hp= {7,4}