Cost of one smartphone = $560
Cost of one tablet = $390
Let the smartphone be x & tablet be y.
Now,
ATQ,
- 300x +310y = $288,900......(1)
- x + y = $ 950......(2)
Multiplying equation (2) by 300, we get
- 300x +300y = $285,000....(3)
Now , we'll subtract equation (3) from equation (2)
300x +310y = $288,900
300x +300y= $285,000
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+10y = $3,900
y = $3,900/10
y = $390
Inserting the value of y in equation 2 ,
we get
- x + $390 = $950
- x = $950-$390
- x = $560
- ∴ the value of x = $560
Therefore,the cost of a smartphone is $560 & that of a tablet is $390
Varification:
Inserting the value of x & y in equation (1),
we get
- 300x +310y = $288,900
- 300*$560 +310*$390 = $288,900
- $168,000 + $120,900 = $288,900
- $288,900 = $288,900
- LHS = RHS
Hence , verified ✓