Seudónimo Seudónimo
  • 25-10-2016
  • Mathematics
contestada

The ages of three siblings combined is 27. The oldest is twice the age of the youngest. The middle child is 3 years older than the youngest. Write and solve an equation to find the ages of each sibling.

Please help!

Relax

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 25-10-2016
x+y+z=27
lets say
x<y<z

z=2x
y=3+x

sub

x+y+z=27
x+3+x+2x=27
4x+3=27
minus 3
4x=24
divide by 4
x=6

y=3+x
y=3+6
y=9

z=2x
y=2(6)
y=12


ages are

6,9,12

Answer Link

Otras preguntas

Solve the inequality -5 -12 > -6x -4
which element would most likely have an electron affinity mesuring closest to zero?
The equation y = mx + b is the slope-intercept form of a linear equation slove y = mx + b for m
A circle with radius of 9 cm sits inside a circle with radius of 11
Nancy took a 3-hour drive. She went 50 miles before she got caught in a storm. Then, she drove 68 miles at 9 mph less than she had driven when the weather was g
Define kinetic energy
Use diagram of equivalent ratios to show that the ratios 2:3 4:6 and 8:12 are equivalent
Twice the difference of a number and 8 is 3 equal to . Use the variable B for the unknown number.
answers A) 20,950.70 B) 28,458.50 C) 31,045.50 D) 34,650.75
The measure of two vertical angles are 8x - 18 and 6x + 14. Find x. a. 16 b. 110 c. 32 4. 70