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ahrayia [7]
4 years ago
7

Solve this system of equations algebraically.

Mathematics
2 answers:
Firdavs [7]4 years ago
8 0

Answer:

x=3, y=-1

Step-by-step explanation:

Irina-Kira [14]4 years ago
5 0

Answer:

(3, - 1 )

Step-by-step explanation:

Given the 2 equations

2x + 3y =  3 → (1)

x + 6y = - 3 → (2)

Multiplying (2) by - 2 and adding to (1) will eliminate the term in x, that is

- 2x - 12y = 6 → (3)

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

- 9y = 9 ( divide both sides by - 9 )

y = - 1

Substitute y = - 1 into either of the 2 equations and solve for x

Substituting into (2)

x + 6(- 1) = - 3

x - 6 = - 3 ( add 6 to both sides )

x = 3

Solution is (3, - 1 )

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Step-by-step explanation:

a₁=b, a₂₁= bₙ, d₁=9, d₂=4

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a₂₁= a₁+20d₁= a₁+20*9= a₁+180

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