Respuesta :
If the TV is 70% off, then that means she paid 30% of the original cost. If 30% of the original cost is $120, then...
30% * x = 120
.30x = 120
x = 120/.30
x = 400
The original cost was $400
30% * x = 120
.30x = 120
x = 120/.30
x = 400
The original cost was $400
original price x (100-70)/100 = $120
therefore; original price = 120 × 100/30 = $400
therefore; original price = 120 × 100/30 = $400