-a-4a+9a-7+2b=

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Solution for -a-4a+9a-7+2b= equation:


Simplifying
-1a + -4a + 9a + -7 + 2b = 0

Reorder the terms:
-7 + -1a + -4a + 9a + 2b = 0

Combine like terms: -1a + -4a = -5a
-7 + -5a + 9a + 2b = 0

Combine like terms: -5a + 9a = 4a
-7 + 4a + 2b = 0

Solving
-7 + 4a + 2b = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 4a + 7 + 2b = 0 + 7

Reorder the terms:
-7 + 7 + 4a + 2b = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 4a + 2b = 0 + 7
4a + 2b = 0 + 7

Combine like terms: 0 + 7 = 7
4a + 2b = 7

Add '-2b' to each side of the equation.
4a + 2b + -2b = 7 + -2b

Combine like terms: 2b + -2b = 0
4a + 0 = 7 + -2b
4a = 7 + -2b

Divide each side by '4'.
a = 1.75 + -0.5b

Simplifying
a = 1.75 + -0.5b

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