Q: What is the variable for 2a plus 9 equals 4a - 19?

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

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

2a+5a+9a = 16a

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 --------------------

It is the expression 3 + 2a.

a= (+a) or a= (-) b= 2a b= 2a c= (-a) c= (+a)

2. 2 plus 2 equals 4 and 2(2)= 4

A equals 20.

2a + 3a + 4 = 5a + 4

14!!

A=2

2a+54=38 2a=38-54 2a=-16 a=-16/2 a=-8

a = 1

2a+12=8 2a=-4 a=-2 So a is -2.

We have, 2a + 24 = 30or, 2a = 30-24or, 2a = 6or, a = 6/2 = 3.Therefore, a equals 3 or simply a=3

a=10

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

It is a linear equation in one variable, a.

If ba = 2a + b , then find 23 + 32 +1

a = 4

6

Algebra

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

A+c= 2a+b

-4 + 2A = 12 - 15A + A-4 + 2A = 12 - 16A2A = 12 - 16A + 42A = 16 - 16AA = 8 - 8A