7(5+4a)+5(-7-2)=-8a-4a

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Solution for 7(5+4a)+5(-7-2)=-8a-4a equation:


Simplifying
7(5 + 4a) + 5(-7 + -2) = -8a + -4a
(5 * 7 + 4a * 7) + 5(-7 + -2) = -8a + -4a
(35 + 28a) + 5(-7 + -2) = -8a + -4a

Combine like terms: -7 + -2 = -9
35 + 28a + 5(-9) = -8a + -4a

Multiply 5 * -9
35 + 28a + -45 = -8a + -4a

Reorder the terms:
35 + -45 + 28a = -8a + -4a

Combine like terms: 35 + -45 = -10
-10 + 28a = -8a + -4a

Combine like terms: -8a + -4a = -12a
-10 + 28a = -12a

Solving
-10 + 28a = -12a

Solving for variable 'a'.

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

Add '12a' to each side of the equation.
-10 + 28a + 12a = -12a + 12a

Combine like terms: 28a + 12a = 40a
-10 + 40a = -12a + 12a

Combine like terms: -12a + 12a = 0
-10 + 40a = 0

Add '10' to each side of the equation.
-10 + 10 + 40a = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 40a = 0 + 10
40a = 0 + 10

Combine like terms: 0 + 10 = 10
40a = 10

Divide each side by '40'.
a = 0.25

Simplifying
a = 0.25

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