Question

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

Answer 1

Answer:

cos ( 390 )

  sin ( 330 )

− 4  cot  ( − 45 )

Step-by-step explanation:

Answer 2

Answer:

(0.5, 4 )

Step-by-step 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 = $\frac{7}{14}$ = $\frac{1}{2}$ = 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 )