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Mathematics
Shaw
21 April, 19:12
1. solve for x and y
2x-y=1
2x+2y=10
+5
Answers (
1
)
Paloma Cortez
21 April, 22:25
0
(2, 3)
Step-by-step explanation:
Given the 2 equations
2x - y = 1 → (1)
2x + 2y = 10 → (2)
Subtract (2) from (1) term by term to eliminate x
2x - 2x - y - 2y = 1 - 10, that is
- 3y = - 9 (divide both sides by - 3)
y = 3
Substitute y = 3 into either (1) or (2) for corresponding value of x
Substituting in (2)
2x + 2 (3) = 10
2x + 6 = 10 (subtract 6 from both sides)
2x = 4 (divide both sides by 2)
x = 2
Solution is (2, 3)
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