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4 votes
2x+3y=13
4x-y=-2
solve the simultaneous equation

2 Answers

4 votes

Answer:

(0.5, 4 )

Explanation:

2x + 3y = 13 → (1)

4x - y = - 2 → (2)

Multiplying (2) by 3 and adding to (1) will eliminate the y- term

12x - 3y = - 6 → (3)

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

14x + 0 = 7

14x = 7 ( divide both sides by 14 )

x =
(7)/(14) =
(1)/(2) = 0.5

Substitute x = 0.5 into either of the 2 equations and solve for y

Substituting into (1)

2(0.5) + 3y = 13

1 + 3y = 13 ( subtract 1 from both sides )

3y = 12 ( divide both sides by 3 )

y = 4

solution is (0.5, 4 )

User Acorn
by
4.3k points
0 votes

Answer:

cos ( 390 )

sin ( 330 )

− 4 cot ( − 45 )

Explanation:

User Olegario
by
4.5k points