Question

Solve the following system of equations.
1/2x + 1/3y = 7
1/4x + 2/3y = 6

Answer 1

x²+y² = 9
Subtract y² from both sides:
x² = 9-y²...(1)

x²-3y = 9...(2)

Substitute the value of x² from (1) into (2):
9-y²-3y = 9
Subtract 9 from both sides:
y²+3y = 0
y(y+3) = 0

Either:
y = 0 or,
y+3 = 0 >> y = -3.

When y = 0,
x²+0 = 9
x² = 9
x = ­­+/-3

When y = -3,
x²+(-3)² = 9
x²+9 = 9
x² = 0
x = 0

Therefore the solutions are:
(x,y) = (+/-3, 0) or (0,-3) got it from yahoo answers

Answer 2

no one of these answer

(1/6, 14)
(6, 12)
(10 2/3, 5)
(2 4/9, -1/6)

Answer 3

ok I got B

Answer 4

so you did the work and you got B]