4x+23=9x-7
Solve for x

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Can some one explain this i got sent this. is this a threat i’m scared