Answer:
[tex]\displaystyle a=\frac{d-3b}{2}[/tex]
Step-by-step explanation:
Equation Solving
It's given the formula:
d = 2a + 3b
To make a the subject, we must perform some operations to isolate the letter on the left side of the equation.
First, swap both sides:
2a + 3b = d
Subtract 3b:
2a = d - 3b
Divide by 2:
[tex]\mathbf{\displaystyle a=\frac{d-3b}{2}}[/tex]
Now a is the subject.