Question 158945
{{{100+4x=139.99}}} -------------> basic eqn
{{{x}}}= savings he need to have per week in $$$$$
{{{4}}}= # of weeks to do it
{{{100}}}= prior savings he got
{{{139.99}}} = total savings he'll get in 4 weeks
Continuing the above eqn,
{{{100+4x=139.99}}}
{{{4x=139.99-100}}}
{{{4x=39.99}}} ------> {{{cross(4)x/cross(4)=cross(39.99)/cross(4)}}}
{{{x=9.998}}}, THE SAVINGS HE NEED TO HAVE EVERY WEEK in 4 WEEKS To HAVE $139.99 (I guess $129 + tax).
Thank you,
Jojo