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Sagot :
Answer:
x = 2, y = -1
Step-by-step explanation:
Now change the equation,
→ x + y = 1
→ y = 1 - x
Then the value of x will be,
→ 2x + y = 3
→ 2x + 1 - x = 3
→ x = 3 - 1
→ [ x = 2 ]
Therefore, the value of x is 2.
Now value of y will be,
→ y = 1 - x
→ y = 1 - 2
→ [ y = -1 ]
Hence, the value of y is -1.
Answer:
(2, -1)
-------
x = 2
y = -1
Step-by-step explanation:
1st equation:
- 2x + y = 3
rewrite
- y = 3 - 2x
2nd equation:
- x + y = 1
rewrite
- y = 1 - x
Solve simultaneously:
- y = y
- 3 - 2x = 1 - x
- -2x + x = 1 - 3
- -x = -2
- x = 2
When x = 2, y = 1 - x
y = 1 - 2
y = -1
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