Use substitution to solve the system of equations x= -3y-13 2x+2y=-6

For this case we have a system of two equations with two unknowns:

To solve we follow the steps below:

We substitute the first equation in the second:

We apply distributive property to the terms of parentheses:

We add 26 to both sides of the equation:

We find the value of x:

unpaid balance is : $149.99-$50 = $99.99 new balance = 149.99+2.62-50 = $102.61 finance charge = 99.99- 0.21/12= $1.75 new balance = 99.99+1.75 = $101.74 average daily balance method average daily balance= 3399.70/30 = $113.32 finance charge = $ 0.21/12ă—113.32 = $1.98 new balance = $149.99-50+1.98 = $101.97