Jika a dan b solusi dari sistem persamaan berikut 2x+3y=25 y=4x-1 Maka nilai a+b=

2x + 3y = 25 (1) : 2x + 3y = 25
-4x + y = -1(3) : -12x + 3y = -3 abis itu dikurang
= 14x = 28
= x = 2
2x + 3y = 25
2.2 +3y = 25
4 + 3y = 25
3y = 25-4
3y = 21
y = 7

a+b = x+y = 2 + 7 = 9