2a = b Is an example of an equation with linear dependence between the variable a and b (b is twice a)
If you know any a you can find the b
If you graph this equation with a on one axis and b on the other (perpendicular) you will get a straight line
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2a. (a, b and c are all equal.)
2a + 2b = 160 But b = a + 40 so 2a + 2(a + 40) = 160 ie 2a + 2a + 80 = 160 or 4a = 80 ie a = 20 Then b = a + 40 gives b = 20 + 40 = 60 Solution: a = 20, b = 60
2a + 2b = c subtract 2a from both sides 2a - 2a + 2b = c - 2a 2b = c - 2a divide both sides by 2 (2/2)b = (c - 2a)/2 b = (c - 2a)/2 --------------------
Let's solve this equation together, friend. To isolate b, we can start by subtracting 2a from both sides of the equation. This will leave us with b equals P minus 2a. Remember, there are many ways to approach a problem, and it's all about finding the one that works best for you.
:a = .5(hb+c) :2a = hb+c :2a−c = hb :(2a−c)/h = b