Seudónimo Seudónimo
  • 10-09-2014
  • Mathematics
contestada

Solve a system by substitution method. 

X + 2y = 6
3x - 2y = 2

Help...?

Respuesta :

ashlea ashlea
  • 10-09-2014
you have to set one of the equations equal to one of the variables.  Easiest one would be using the top equation. SO
x=6-2y
then substitute 6-2y in the 2nd equation for the x. SO
3(6-2y)-2y=2
18-6y-2y=2
18-8y=2
-8y=-16
y=2
so you know what y is you can plug in the value of it to find x
3x-2(2)=2
3x-4=2
3x=6
x=2

x=2 and y=2
you can check your answers to see that it is correct

Answer Link

Otras preguntas

How do you find the perimeter of a dented square?
How do you find the perimeter of a dented square?
At the begining of 6 grade the ratio of number of the advanced math students to the number of regular students was 3:8. However after taking the placement tests
if arctan(3/5)=K    Tan(k)=?
At the begining of 6 grade the ratio of number of the advanced math students to the number of regular students was 3:8. However after taking the placement tests
What was an effect of nationalism in Europe in the early 1900s?
Here's a story problem...."Rita's wants to estimate the number of beans in a large jar.  She takes out 100. she takes out 100 beans and marks them. Then she ret
Here's a story problem...."Rita's wants to estimate the number of beans in a large jar.  She takes out 100. she takes out 100 beans and marks them. Then she ret
What was an effect of nationalism in Europe in the early 1900s?
What was an effect of nationalism in Europe in the early 1900s?
good job