Please help me ill mark you brainliest and please show your work so i can write it down

Look at attachment. has all info needed. need

Find the maximum value of p= 4x + 5y subject to the following constraints :

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?