Answer:
To solve for a , it means you have to look for a way to make sure that "a" stands alone, i.e you are to make "a" the subject of the formula
The first thing is to turn it to a linear equation by multiplying through by 2
i.e 2 x s = (2xa) +(2xb) + (2 x c/2)
which gives: 2S = 2a + 2b + c
next, subtract 2b and c from both sides
which give 2S- 2b - c = 2a
which you can also write as : 2a = 2S - 2b - c
Divide both side by 2, to make "a" stands alone
therefore: a = 2S/2 - 2b/2 - c/2
a = S - b - c/2
Step-by-step explanation:
