You multiply by 10 or more
First, multiply by 3 on both sides:

Divide by 7:

So,
k = 9
1) B 60 roses 10 carnations
2) D (3,-2),(-2,-6),(3,4)
Hey there! I'm happy to help!
If you raise a fraction to an exponent, you apply that exponent to the numerator and the denominator. This would give us
.
Have a wonderful day! :D