Parents wish to have $120,000 available for a child's education. if the child is now 2 years old, how much money must be set aside at 3% compounded semiannually to meet their financial goal when the child is 18?

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1) add 6 to 24, write the rest of the equation 10-2x= 30 subtract 10 from 30 2x=20 divide 20 by 2 and x=102) add 3 to -9 write the rest of the equation 4x+3=-6 subtract 3 from -6 4x=-9 x= -2.25  i don't know the rest sorry

Iwould say the answer is a