A system of equations has 1 solution. If 4x – y = 5 is one of the equations, which could be the other equation? y = –4x + 5
y = 4x – 5
2y = 8x – 10
–2y = –8x – 10

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.