Answer:
Step-by-step explanation:
3x - 4y = 13 (1)
2x + y = 5 (2)
——————
3x - 4y = 13
4(2x + y = 5) (2) times 4
——————-
3x - 4y = 13
8x + 4y = 20
——————-
11x = 33
x = 33/11
x = 3
Plug x = 3 in (2):
2(3) + y = 5
6 + y = 5
y = 5-6
y = -1
Thus, x = 3 and y = -1
Responda:
R $ 15.600
Explicação passo a passo:
Deixe a dívida inicial = x = 100%
% pago = 20% = 0,2x
% esquerda =. 100% - 20% =. 80% = 0,8x
35% da dívida restante = 0,35 * 0,8x = 0,28x
Conseqüentemente,
0,28x = 4368
x = 4368 / 0,28
x = R $ 15.600
Logo, o valor inicial da dívida = R $ 15.600
Answer:
The answer is 150.72
Step-by-step explanation:
Answer:
The answer is 80 :)
Step-by-step explanation:
Answer:
Each question worth 5.
Step-by-step explanation:
Each question worth 5 Point because
5 x 20 = 100
Hence, 20 question each question worth 5 point.
If You get a 45% then you miss 11 question and only get 9 question correct..
9/20 x 100 = 45.
