Question

If x/3 + x/7 = 10, what is the value of x?

Answer 1

Answer:

21

Step-by-step explanation:

3+3x/7=30

7x+3x=210

10x=210

x=21

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Answer 2

Given,

• x/3 + x/7 = 10

Solution

x/3 + x/7 = 10

Taking LCM of denominators ie, 3 and 7

The LCM would be 3×7 = 21

x/3 = 7x/21 (equivalent fraction)

x/7 = 3x/21 (equivalent fraction )

Therefore,

x/3 + x/7 = 10

or, 7x/21 + 3x/21 =10

or, 10x/21 =10

or, 10x = 210

or, x = 21

Thus the value of x is 21.

Checking correction

21/3 + 21/7

or, 7 + 3

or, 10

Therefore, our answer is correct.