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Mayyy5555
@Mayyy5555
December 2019
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Alguém me ajuda?? Pfvrr!! Preciso muitooo
Resolva os sistemas de Equações pelo método da ADIÇÃO:
D) {2x-y =20
{2x +y= 48
E) {2x-3y= -16
{5x+3y= 2
F) {3x+y=0
{11x-y= 42
G) {x+3y= 5
{2x-y= -4
H) {3x + 3y=21
{2x-y=5
I) {x-y= 3
{2x+3y=16
j) {5x+y=5
{10x-2y= -2
k) {x-3= 0
{2x-y=1
L) {5x-y= 4
{2x-y= -5
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Debinhacs
D)
{2x-y=20
{2x+y=48
——————
4x=68
x= 68/4
x= 17
E)
{2x-3y=-16
{5x+3y=2
——————
7x=-14
x= -14/7
x= -2
F)
{3x+y=0
{11x-y=42
——————
14x=42
x= 42/14
x= 3
G)
{x+3y=5
{2x-y=-4 .(3)
{x+3y=5
{6x-3y=-12
——————
7x= -7
x= -7/7
x= -1
H)
{3x+3y=21
{2x-y=5 .(3)
{3x+3y=21
{6x-3y=15
——————
9x=36
x= 36/9
x=4
2 votes
Thanks 4
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{2x-y=20
{2x+y=48
——————
4x=68
x= 68/4
x= 17
E)
{2x-3y=-16
{5x+3y=2
——————
7x=-14
x= -14/7
x= -2
F)
{3x+y=0
{11x-y=42
——————
14x=42
x= 42/14
x= 3
G)
{x+3y=5
{2x-y=-4 .(3)
{x+3y=5
{6x-3y=-12
——————
7x= -7
x= -7/7
x= -1
H)
{3x+3y=21
{2x-y=5 .(3)
{3x+3y=21
{6x-3y=15
——————
9x=36
x= 36/9
x=4