nanazb18 nanazb18
  • 24-10-2017
  • Mathematics
contestada

x+y=20 3x-3y=30 Which values of x and y satisfy this system of equations?

Respuesta :

musiclover10045
musiclover10045 musiclover10045
  • 24-10-2017

x +y = 20 ( rewrite as x = 20-y)

3x - 3y =30

3(20-y) - 3y = 30

60-3y - 3y = 30

60-6y = 30

-6y = -30

y = -30 / -6 = 5

x=20-5 = 15

x = 15, y = 5

Answer Link

Otras preguntas

Which element of caliban character is best illustrated by this excerpt
if A is a point on Y-axis whose ordinate is 4 and coordinate of Bis (-3,1),then find the distance of AB
Write an equation for the line parallel to the given line that contains C C(-1,7);y=5/9x-1
Can someone summarize this in one sentence PLZ In 1863 the state experienced a serious drought and an early frost, and Governor Brown announced to the legisla
Is this better ? Please help
The sales tax on a model rocket which costs $24 is $1.92. What is the percent of sales tax?
how to overcome laziness
Why did British strategy in dealing with the New England states failed?
What is one distinguishing characteristic of a myth?
Coping strategies can be either ________-focused or ________-focused in nature. problem; emotion distress; eustress physiologically; spiritually internally; ext