4(a+2)-9(a+9)=-4(2a+9)-16

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Solution for 4(a+2)-9(a+9)=-4(2a+9)-16 equation:


Simplifying
4(a + 2) + -9(a + 9) = -4(2a + 9) + -16

Reorder the terms:
4(2 + a) + -9(a + 9) = -4(2a + 9) + -16
(2 * 4 + a * 4) + -9(a + 9) = -4(2a + 9) + -16
(8 + 4a) + -9(a + 9) = -4(2a + 9) + -16

Reorder the terms:
8 + 4a + -9(9 + a) = -4(2a + 9) + -16
8 + 4a + (9 * -9 + a * -9) = -4(2a + 9) + -16
8 + 4a + (-81 + -9a) = -4(2a + 9) + -16

Reorder the terms:
8 + -81 + 4a + -9a = -4(2a + 9) + -16

Combine like terms: 8 + -81 = -73
-73 + 4a + -9a = -4(2a + 9) + -16

Combine like terms: 4a + -9a = -5a
-73 + -5a = -4(2a + 9) + -16

Reorder the terms:
-73 + -5a = -4(9 + 2a) + -16
-73 + -5a = (9 * -4 + 2a * -4) + -16
-73 + -5a = (-36 + -8a) + -16

Reorder the terms:
-73 + -5a = -36 + -16 + -8a

Combine like terms: -36 + -16 = -52
-73 + -5a = -52 + -8a

Solving
-73 + -5a = -52 + -8a

Solving for variable 'a'.

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

Add '8a' to each side of the equation.
-73 + -5a + 8a = -52 + -8a + 8a

Combine like terms: -5a + 8a = 3a
-73 + 3a = -52 + -8a + 8a

Combine like terms: -8a + 8a = 0
-73 + 3a = -52 + 0
-73 + 3a = -52

Add '73' to each side of the equation.
-73 + 73 + 3a = -52 + 73

Combine like terms: -73 + 73 = 0
0 + 3a = -52 + 73
3a = -52 + 73

Combine like terms: -52 + 73 = 21
3a = 21

Divide each side by '3'.
a = 7

Simplifying
a = 7

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