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1 vote
2x + 5y = 8
x - 2y = -5
Simultaneously pleasee

User Ramrunner
by
8.6k points

2 Answers

8 votes

Answer:

3

Explanation:

User Yktula
by
8.5k points
12 votes

Answer:

(- 1, 2 )

Explanation:

2x + 5y = 8 → (1)

x - 2y = - 5 → (2)

multiplying (2) by - 2 and adding to (1) will eliminate x

- 2x + 4y = 10 → (3)

add (1) and (3) term by term to eliminate x

0 + 9y = 18

9y = 18 ( divide both sides by 9 )

y = 2

substitute y = 2 into either of the 2 equations and solve for x

substituting into (1)

2x + 5(2) = 8

2x + 10 = 8 ( subtract 10 from both sides )

2x = - 2 ( divide both sides by 2 )

x = - 1

solution is (- 1, 2 )

User Adam Maras
by
7.5k points

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