Jeremy wants to buy a new computer. The saleswoman says he can make a down payment and then pay for the computer in installments.

Here is a formula that describesscenario:this

x=t-yz

x-amount down

y-money each month

z-number of months

t-total price

what we want to do is get the equation into the formt=...remember that whatever you do on the right side of the equals sign you must also do on the left side:

.....x=t-yz .................Lets add yz to both sides

yz+x=t-yz+yz.............The -yz+yz cancels out

yz+x=t......................or

.....t=x+yz