2(3-a)+7(2-a)=15-4a

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Solution for 2(3-a)+7(2-a)=15-4a equation:


Simplifying
2(3 + -1a) + 7(2 + -1a) = 15 + -4a
(3 * 2 + -1a * 2) + 7(2 + -1a) = 15 + -4a
(6 + -2a) + 7(2 + -1a) = 15 + -4a
6 + -2a + (2 * 7 + -1a * 7) = 15 + -4a
6 + -2a + (14 + -7a) = 15 + -4a

Reorder the terms:
6 + 14 + -2a + -7a = 15 + -4a

Combine like terms: 6 + 14 = 20
20 + -2a + -7a = 15 + -4a

Combine like terms: -2a + -7a = -9a
20 + -9a = 15 + -4a

Solving
20 + -9a = 15 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
20 + -9a + 4a = 15 + -4a + 4a

Combine like terms: -9a + 4a = -5a
20 + -5a = 15 + -4a + 4a

Combine like terms: -4a + 4a = 0
20 + -5a = 15 + 0
20 + -5a = 15

Add '-20' to each side of the equation.
20 + -20 + -5a = 15 + -20

Combine like terms: 20 + -20 = 0
0 + -5a = 15 + -20
-5a = 15 + -20

Combine like terms: 15 + -20 = -5
-5a = -5

Divide each side by '-5'.
a = 1

Simplifying
a = 1

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