If in 7 years, sam would be 2 times old as she was 3 years ago. what is sams present age?

Answer

Sam is 13 years old

Step-by-step explanation:

He is 13 years old.

13+7=20

13-3=10

10x2=20

13

Step-by-step explanation:

We can represent this in an algebra equation

(x+7)=2(x-3)

(x+7)=2x-6

(x+7)=2x-6

-2x    -2x

-x+7=-6

-7       -7

-x= -13

/-1    /-1

x=13

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x