Select the ordered pair from the choices below that is a solution to the following system of equations:
4y = 2x + 10
8x − 3y = -14

a. (-1, 2)
b. (7, 6)
c. (-3, 2)
d. (5, 5)

Question

Select the ordered pair from the choices below that is a solution to the following system of equations:
4y = 2x + 10
8x − 3y = -14
 
    a. (-1, 2) 
    b. (7, 6) 
    c. (-3, 2) 
    d. (5, 5)

anonymous · Answer

a. (-1, 2)

anonymous · Answer

@El-naggar : how ?

anonymous · Answer

sorry , i'll tell you how to solve these two equations

anonymous · Answer

multiply the first equation by 4 it gives
16y=8x+40
rearranging the equations
8x=16y-40 ,
8x=3y-14
subtracting the two equations 
gives
0=13y-26 then y=2
hence x can be calculated from the first equation
x= ((4*2)-10)/2 = -1