Question

The cost of a pencil 25 cents more than the cost of eraser if the cost of 8 pencil and 10 eraser is rupees12.80find the cost of each

Answer 1

Answer:

Pencil = 85 cents, Eraser = 60 cents

Step-by-step explanation:

P = E + 0.25 [Eq. 1]

8P + 10E = 12.8 [Eq. 2]

Put Eq. 1 in Eq. 2:

8(E+0.25) + 10E = 12.8

8E + 2 + 10E = 12.8

18E = 10.8

E = 0.60

Using [Eq.1] to find P:

P = 0.6 + 0.25 = 0.85

Answer 2

Step-by-step explanation:

GIVEN:-

The cost of a pencil 25 cents more than the cost of eraser if the cost of 8 pencil and 10 eraser is rupees 12.

TO FIND:-

Find the cost of each accessories.

SOLUTION:-

LET THE COST OF ERASER BE ⬇️

$x$

COST OF PENCIL= 26 CENTS

$8(x + 25) + 10 \times x = 12.80 \times 100 \\ 8x + 200 + 10x = 1280 \\ 18x = 1080 \\ x = \frac{1080}{18} \\ x = 60$

THEREFORE COST OF ERASER = 60 cents

COST OF PENCIL = 85 cents