9(a-4)+2(a-20)=a-11

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Solution for 9(a-4)+2(a-20)=a-11 equation:


Simplifying
9(a + -4) + 2(a + -20) = a + -11

Reorder the terms:
9(-4 + a) + 2(a + -20) = a + -11
(-4 * 9 + a * 9) + 2(a + -20) = a + -11
(-36 + 9a) + 2(a + -20) = a + -11

Reorder the terms:
-36 + 9a + 2(-20 + a) = a + -11
-36 + 9a + (-20 * 2 + a * 2) = a + -11
-36 + 9a + (-40 + 2a) = a + -11

Reorder the terms:
-36 + -40 + 9a + 2a = a + -11

Combine like terms: -36 + -40 = -76
-76 + 9a + 2a = a + -11

Combine like terms: 9a + 2a = 11a
-76 + 11a = a + -11

Reorder the terms:
-76 + 11a = -11 + a

Solving
-76 + 11a = -11 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-76 + 11a + -1a = -11 + a + -1a

Combine like terms: 11a + -1a = 10a
-76 + 10a = -11 + a + -1a

Combine like terms: a + -1a = 0
-76 + 10a = -11 + 0
-76 + 10a = -11

Add '76' to each side of the equation.
-76 + 76 + 10a = -11 + 76

Combine like terms: -76 + 76 = 0
0 + 10a = -11 + 76
10a = -11 + 76

Combine like terms: -11 + 76 = 65
10a = 65

Divide each side by '10'.
a = 6.5

Simplifying
a = 6.5

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