Question

Help me with thsi one please

Answer 1

Explanation:

It's not rocket science. What we need to do is simply 'cross-multiply' them and then do the rest calculations. So, what's provided as per given problem is "9/x = -3/10". As I said in the beginning, we just need to cross multiply them to reach to our destination.

Let's proceed!

`\implies{\sf{9/x = -3/10}}`

On cross-multplying we get,

`\implies{\sf{9(10) = -3(x)}}`

Solve the brackets,

`\implies{\sf{90 = -3x}}`

Divide by 3 on both sides,

`\implies{\sf{90/3 = -3x/3}}`

`\implies{\sf{30 = -x}}`

`\implies{\sf{-x = 30}}`

`\implies{\sf{x=-30}}`

Therefore, the value of x is - 30.

The other way to solve this problem is first cut the divisible term. In simple words 9 is divisible of 3. So, at this time our equation looks like: 3/x = -1/10. Again cross multiply them. Cross-multiplication is the key to solve such questions!

`\implies{\sf{3/x = -1/10}}`

`\implies{\sf{3(10) = -1(x)}}`

`\implies{\sf{30 = -x}}`

`\implies{\sf{x=-30}}`