Question 153276
Remember:
{{{P=price}}} for the stuff Donna bought
Putting into eqn less 10%:
P-10%P=$217.95+tax ---->{{{P-0.10P=217.95+cross(tax)}}}
*tax is negligible in this case since we're not on the total pay out price.
Continuing,
{{{P(1-0.10)=217.95}}}
{{{P*cross(0.90)/cross(0.90)=cross(217.95)242.17/cross(0.90)}}}
{{{P=242.17}}} ---------> PRICE WITHOUT 10% COUPON
Thank you,
Jojo