-3a-2(a-9)=7

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Solution for -3a-2(a-9)=7 equation:


Simplifying
-3a + -2(a + -9) = 7

Reorder the terms:
-3a + -2(-9 + a) = 7
-3a + (-9 * -2 + a * -2) = 7
-3a + (18 + -2a) = 7

Reorder the terms:
18 + -3a + -2a = 7

Combine like terms: -3a + -2a = -5a
18 + -5a = 7

Solving
18 + -5a = 7

Solving for variable 'a'.

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

Add '-18' to each side of the equation.
18 + -18 + -5a = 7 + -18

Combine like terms: 18 + -18 = 0
0 + -5a = 7 + -18
-5a = 7 + -18

Combine like terms: 7 + -18 = -11
-5a = -11

Divide each side by '-5'.
a = 2.2

Simplifying
a = 2.2

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