lexi40033
lexi40033
01-12-2017
Mathematics
contestada
How do I solve 4x-y=-9 3x-3y=0 by elimination
Respuesta :
Аноним
Аноним
01-12-2017
First multiply the first equation by -3 , you get:-
-12x + 3y = 27
now add this to second equation
3x - 3y = 0
and you eliminate y
solve for x and substitute this value of x into equation 1 to find y.
Answer Link
tynollette
tynollette
01-12-2017
4x-y=-9, so y=4x+9
replace the y in the second equation iwth 4x+9:
3x-3(4x+9)=0
3x-12x-27=0
-9x=27
x=-3
y=4x+9=4*(-3)+9=-3
Answer Link
VER TODAS LAS RESPUESTAS ( 74+ )
Otras preguntas
Find an equivalent ratio for 22/55 and then write the proportion
FACTORIZE. 9x2y-24xy2-16y3 solve it
what is the cause and effect for the french citizens armies win their revolution for liberty and equality
if you live 35 miles from work & drive 35 mph how long would it take to get there
16 increased by twice a number is -24. Find the solution??
solve 2/3 + 1/4x = 1/3
Buck drove 220 miles in 5 hours. What was his average rate of speed?
you have a full cylindrical glass of water that stands 8 inches tall and has a radius of 1.5 inches .if you pour the water into a larger cylindrical glass that
Who were the Nazis ?
you have a full cylindrical glass of water that stands 8 inches tall and has a radius of 1.5 inches .if you pour the water into a larger cylindrical glass that