mathematics question.. please help?

[Ashnovella]

aX + 2Y=3

Given gradient = -2 and find the value of a.

please give ur working thanks...

 

[sardar m]

ax + 2y = 3
y = (3 - ax)/2

y = 3/2 - ax/2
gradient = m = a/2

so -2 = a/2
a = -4