Verified Answer :

kkumi301

it is 30 because 4x-3y to 12x-9y is 3 times bigger
So you can multiply 3 to 10, that will be 30!

Answer:  The required value of the given expression is 30.

Step-by-step explanation:  We are given that

\(4x-3y=10~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\)

We are to find the value of the following expression :

\(12x-9y.\)

We have

\(12x-9y\\\\=3(4x-3y)\\\\=3\times10~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{Using equation (i)}]\\\\=30.\)

Thus, the required value of the given expression is 30.

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