Question

5x + 8y = 50 ,if y = 10 ,then find the value of x

Answer 1

5x + 8 × 10 = 50 ( y = 10 )
5x +80 = 50
5x = 50 - 80
5x = -30
x = -30 / 5
x = -6

Hence the value of x = -6

I think this is the right answer .

Answer 2

Answer:

The correct answer will be x = -6.

Step-by-step explanation:

Given,

The question is 5x+ 8y = 50

and we are given that the value of y is 10. or y = 10.

So in this question, we have to substitute the known value of y = 10 in the given equation and solve it to get the value of y.

$5x+ 8 y=50$

put y = 10,

$5x+ 8\times10 = 50\\\\5x = 50 -80\\\\5x = -30\\\\x = -6$

We got the value of x is -6 or x = -6.

Now, we can check whether our answer is correct.

For checking we will just put the value of x = -6 and the value of y = 10 and see if we are getting 50.

$= 5x+8y\\\\=5\times-6+8\times10\\\\=-30+80\\\\=50$

We got LHS = RHS, so our answer is correct.

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