Best Answer

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

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Q: How do you solve for the variable b in 2a plus 2b equals c?

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2a + 9 = 4a - 19 9 + 19 = 4a - 2a 28 = 2a a = 14

Subtract 2a from each side: P - 2a = b ie b = P - 2a

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

:a = .5(hb+c) :2a = hb+c :2a−c = hb :(2a−c)/h = b

To solve this, isolate x. first, add 10 to both sides. this will leave you with 2a + 15 = a Then, subtract 2a from both sides. This will leave you with 15 = -a Therefore, -15 = a

Related questions

a = 4

depends what 'a' =

-2a + 5 = 1 -2a = -5 + 1 -2a = -4 a = -4/-2 a = 2

2a + 9 = 4a - 19 9 + 19 = 4a - 2a 28 = 2a a = 14

If: 2a+13 = 5a+1 Then: a = 4

Subtract 2a from each side: P - 2a = b ie b = P - 2a

a+a=1 2a=1 a=1/2

a + a + a - 2a = 3a - 2a = a

96

Solve the following equation for A : 2A/3 = 8 + 4A

the answer

It is, in fact, an identity - which is an equation which is true for all values of the variable.