fanny031722
fanny031722
28-04-2016
Mathematics
contestada
2x + y =20
6x - 5y =12
Respuesta :
apologiabiology
apologiabiology
28-04-2016
multiply firs equaiton by -3
-6x-3y=-60
add to other equation
-6x-3y=-60
6x-5y=12 +
0x-8y=-48
-8y=-48
divide by -8
y=6
sub
2x+y=20
2x+6=20
minus 6
2x=14
divide 2
x=7
x=7
y=6
(7,6)
Answer Link
VER TODAS LAS RESPUESTAS ( 83+ )
Otras preguntas
Mary Katherine has a bag of 3 red apples , 5 yellow apples and 4 green apples , Mary takes a red apples out of the bag and does not replace it. What is the prob
If a substance contains ionic bonds, then its properties would include
Which statement describes how chemical formulas, such as H20, represent compounds?
When the Supreme Court rules on a constitutional issue, that judgment is virtually final; its decisions can be altered only by the rarely used procedure of cons
Record the lengths of the sides of ABC and ADE.
Mrs. Gladstone's arguments against cuts in Social Security are worthless. As a recipient of Social Security benefits, she would naturally be expected to argue e
I need help can’t figure this out :/ The table represents Joel's earnings fordelivering papers. How much does Joelearnperpaper? Show yourwork. Please help me I’
Have you guys seen Hamilton? Got any interesting info on George Washington's life?
Solve for hh(x)=a(x-h)^2+kh(x)=x^2-8x+14
The cost of having a window fixed is $100 plus $20 per hour of labor. Using h for the number of hours of labor, write an expression that represents the total co
