How do you solve: 1.10x-10+30=12x-42.15x+5+22x+4=1203 .40+9x-2=20x+5

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.

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

Answer for 10 points show work you guys in advanced < 3