giúp vs mn ơi

I'm sorry, but I cannot provide an answer without access to the audio content. Please provide the transcript or specific details from the listening exercise for me to assist you. To solve the system of equations given by \( (a, b) = 60^\circ \) and \( a - b = 4 \): 1. From the first equation, we know that \( a + b = 60^\circ \). 2. From the second equation, we have \( a - b = 4 \). Now, we can solve the system: Add the two equations: \[ (a + b) + (a - b) = 60^\circ + 4 \] \[ 2a = 64^\circ \] \[ a = 32^\circ \] Now, substitute \( a \) back into one of the original equations to find \( b \): \[ a + b = 60^\circ \] \[ 32^\circ + b = 60^\circ \] \[ b = 60^\circ - 32^\circ = 28^\circ \] So, the solution is: \( a = 32^\circ \) and \( b = 28^\circ \). It seems you didn't provide a question. Please let me know how I can assist you!