X-4y=10 x+y=5 what has the same solution

Carl wants to buy a television that cost $500 including taxes. to pay for television he will use a payment plan that requires him to make a down payment of $125 and then pay $70.50 each month for six months what is the percent increase from the original cast of the television to the cost of the television using a payment plan.

What are the solutions to the equation 4x2+3x=24-x

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers