Question 1206718
t for original total amount

Following literally the description {{{t-540-(t-540)/5-180=t/14}}}


{{{t-540-t/5+540/5-180=t/14}}}

{{{(4/5)t-540-180+108=t/14}}}

{{{(4/5)t-612=t/14}}}

{{{(4/5-1/14)t=612}}}, LCD 70

{{{70(4/5-1/14)t=70*612}}}

{{{(56-5)t=70*612}}}

{{{t=(70*612)/51}}}

{{{highlight(t=840)}}}