Can someone pls help me with the question i posted earlier asap pleasee

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.

In an equilateral triangle, each angle is represented by 5y+3. what is the value of y? a. 9.7 b. 10.8 c. 11.4 d. 7.2