Jane is 5 times as old as her sister. in 3 years jane will be twice as old as her sister. how old are they now?

jane is 5 and her sister is 1

Step-by-step explanation:

we don't know jane's sister age, so we will use x

she is 5 times as old as her, so jane is 5x

in 3 years, jane will be 2 times as old as her

so you add 3 to both their ages

then you set an equation. to make their ages equal, you multiple her sister's age by 2

you then get

5x+3=2(x+3)

5x+3=2x+6

x=1

Her sister is 1 and Jane is 5

2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6