Question

determine the value of b if -1,10 is the solution of the equation 3x+by= 27 . Also find the coordinates of the point on its graph for which x=7.

Answer 1

Answer:

x = -1 , y = 10

put the value of x and y in this equation

3 ( -1) + b ( 10 ) = 27

-3 + 10b = 27

10b = 27 + 3 = 30

b = 30 /10 = 3

b = 3

when x = 7

3 ( 7 ) + 3(y) =27

21 + 3y = 27

3y = 27 -21

3y = 6

y = 6/3

y = 2