Question

The price of two
calculator and one watch
is 1800. The price of a
watch is 600 more than a
calculator. What is the
price of a calculator?
Select one:
a. 400
O b. 800
C. 600
O d. 900
O e. None of these​

Answer 1

Answer:

none of these.........

Answer 2

Answer:

a. 400

Step-by-step explanation:

2 calculator + 1 Watch = 1800

If, 1 watch = x

Then, 1 Calculator = x - 600

Or, 2 Calculator = 2 (x - 600)

Then, 2 (x - 600 ) = 1800 - x

Or, 2x - 1200 = 1800 - x

Or, 2x + x = 1800 + 1200

Or, 3x = 3000

Or, x = 1000

So, 1 watch = 1000

Then 1 Calculator = (1000 - 600 ) = 400