9a+7=10(a-1)-4(1-5a)

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Solution for 9a+7=10(a-1)-4(1-5a) equation:


Simplifying
9a + 7 = 10(a + -1) + -4(1 + -5a)

Reorder the terms:
7 + 9a = 10(a + -1) + -4(1 + -5a)

Reorder the terms:
7 + 9a = 10(-1 + a) + -4(1 + -5a)
7 + 9a = (-1 * 10 + a * 10) + -4(1 + -5a)
7 + 9a = (-10 + 10a) + -4(1 + -5a)
7 + 9a = -10 + 10a + (1 * -4 + -5a * -4)
7 + 9a = -10 + 10a + (-4 + 20a)

Reorder the terms:
7 + 9a = -10 + -4 + 10a + 20a

Combine like terms: -10 + -4 = -14
7 + 9a = -14 + 10a + 20a

Combine like terms: 10a + 20a = 30a
7 + 9a = -14 + 30a

Solving
7 + 9a = -14 + 30a

Solving for variable 'a'.

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

Add '-30a' to each side of the equation.
7 + 9a + -30a = -14 + 30a + -30a

Combine like terms: 9a + -30a = -21a
7 + -21a = -14 + 30a + -30a

Combine like terms: 30a + -30a = 0
7 + -21a = -14 + 0
7 + -21a = -14

Add '-7' to each side of the equation.
7 + -7 + -21a = -14 + -7

Combine like terms: 7 + -7 = 0
0 + -21a = -14 + -7
-21a = -14 + -7

Combine like terms: -14 + -7 = -21
-21a = -21

Divide each side by '-21'.
a = 1

Simplifying
a = 1

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