Tolong sertakan caranya ya, terima kasih

A + B = C

(2x + 5) + (-3) = 4
2x + 2 = 4
2x = 4 - 2
x = 2/2
x = 1

5 + (3y + 1) = 24
3y + 6 = 24
3y = 24 - 6
y = 18/3
y = 6

x + y = 1 + 6 = 7 (C)