Answer:
Let n= original price
120 = sale price
n x 20% =0.2n
120 - 0.2n = n
Step 1: Simplify both sides of the equation.
0.2n + 120 = n
Step 2: Subtract n from both sides.
0.2n+120-n = n-n
-0.8n+120= 0
Step 3: Subtract 120 from both sides.
-0.8n+120-120= 0-120
-0.8n= -120
Step 4: Divide both sides by -0.8.
(-0.8n) / (-0.8) = (120) / (0.8)
n =150
Original price is 150 pesos
Step-by-step explanation:
