Mr. kim is 25 years older that his daughter. in 10 years mr. kim will be twice as old as his daughter will be . how old is each now?

Mr.Kim is presently 40 years old, and his daughter is 15 years old.

Step-by-step explanation:

K is Mr Kim's present age

D=his daughter's present age.

K=D+25 ; or Mr.Kim is his daughter's age plus 25 years.

K+10=2(D+10); or in 10 years, Mr Kim will be twice daughters age

Substitute the K from the first equation into the second equation and then solve for variable D.

(D+25)+10 = 2(D+10) Simplify.

D+35 = 2D+20 You must subtract D from both sides.

35 = D+20 Lastly, subtract 20 from both sides.

15 = D or D = 15

Mr Kim's daughter's is 15 years old.

Mr Kim's age is D+25

15+25 = 40 years old.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

-1   1/6.   you dont subtract the denominators

step-by-step explanation: