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irinina [24]
2 years ago
10

Solve the following simultaneous equations. x + y = 3 x -y = 1

Mathematics
2 answers:
Natali [406]2 years ago
8 0
Answer: x = 2, y = 1

Step-by-Step Solution:

=> x + y = 3 (Eq. 1)
=> x - y = 1 (Eq. 2)

Adding Eq. 1 and Eq. 2, we get :-

2x = 3 + 1
2x = 4
x = 4/2
=> x = 2

Therefore, x = 2

Substitute value of ‘x’ in Eq. 1 :-

x + y = 3
(2) + y = 3
2 + y = 3
y = 3 - 2
=> y = 1

Therefore, y = 1

Hence, x = 2 and y = 1.
monitta2 years ago
4 0

Answer:

<u>x = 2, y = 1 or (2, 1)</u>

Step-by-step explanation:

<u>Solving by elimination method</u> :

  • x + y + (x - y) = 3 + 1
  • 2x = 4
  • x = 2

  • 2 - y = 1
  • y = 1

The solution is : x = 2, y = 1 or (2, 1)

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X+2y=0<br> 3x+4y=4<br><br> find the solution
Nady [450]

Answer:

  (x, y) = (4, -2)

Step-by-step explanation:

The coefficient of y in the second equation is double the coefficient of y in the first. We can subtract twice the first equation from the second to eliminate y.

  (3x +4) -2(x +2y) = (4) -2(0)

  x = 4 . . . . . . . . . simplify

Substituting into the first equation, we have ...

  4 +2y = 0

  2 +y = 0 . . . . . . divide by 2

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The solution is (x, y) = (4, -2).

4 0
2 years ago
The difference between two numbers is 275.the smaller number is 236 what is the sum of both numbers​
kirza4 [7]

Answer:

747

Step-by-step explanation:

let the 2 numbers be x and y with x > y, then

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Add 236 to both sides

x = 511

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7 0
3 years ago
In this unit, you studied a handful of circle theorems. Research to find a circle theorem that wasn’t presented in this unit and
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angle in a semicircle is a right angle. Angles that are in the same segment are equal.

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7x + 2y = 4
Vinil7 [7]

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5 0
2 years ago
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