Question

Calcule os valores de X e y.
A)X+2Y=40
X-Y=10
B)X-5Y=30
X-Y=6

C)X+4Y=50
X-Y=5

D)X+3Y=20
X-Y=4

Answer 1

Resposta:

×+2y=40

×-y=10

2×+y=50

2×+y=50

y=50-2×

×+2y=40

×+2.50-2×=40

×+100-4×=40

×-4×=40-100

-3×=-60 .(-1)

3×=60

×=60/3

×=20

20-y=10

-y=10-20

-y=-10.(-1)

y=10

20+2.10=40

20+20=40

40=40✅

20-10=10

10=10✅