Answer:
A) a = -12.5
Step-by-step explanation:
The variable, a, has been multiplied by -4/5 and then -9 added to the product. To solve for a, we undo these operations in reverse order.
To undo addition of -9, we add 9 to both sides of the equation.
-4a/5 = 10
To undo multiplication by -4/5, we multiply the equation by its reciprocal:
(-5/4)(-4a/5) = 10(-5/4)
a = -50/4 = -12.5
The one solution is a=-12.5.
