Solve the simultaneous equation2x-y=8x+y=7SHOW ALL WORKING OUT PLEASE. THANKS

1 answer:

5 0

2x-y=8...(1)
x+y=7....(2)

from (2)
y=7-x....(3)

put (3) into (1)
2x-(7-x)=8
2x-7+x=8
2x+x=8+7
3x=15
x=5.....(4)

put (4) into (2)
x+y=7
5+y=7
y=7-5
y=2

Hope it helps c:

You might be interested in

HALPPPP. Awarding Brainliest!!<br><br> Pythagorean Theorem.

Verdich [7]

Answer:

d = 5.4

Step-by-step explanation:

Pythagorean theorem: a^2 + b^2 = c^2

a = 2

b = 5

2^2 + 5^2 = c^2

4 + 25 = c^2

29 = c^2

c = 5.4

5 0

3 years ago

Read 2 more answers

In a baseball league consisting of 15 teams, each team plays each of the other teams three times. How many games will be played

denis23 [38]

Answer:

315

Step-by-step explanation:

Each of the 15 teams plays each of the other 14, for a total of 210 games. However, that count includes both A playing B and B playing A. Hence, if the teams meet 3 times, the total number of games will be 3/2 this amount:

(15)(14)(3/2) = 315 . . . league games

5 0

3 years ago

The length of the rectangle is x + 12. The width of the rectangle is x + 3. Please determine the area of the rectangle.

harina [27]

Answer:area = x^2 +15x +36

Step-by-step explanation: