4a(a-4)-7a=a(4a-3)+20

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Solution for 4a(a-4)-7a=a(4a-3)+20 equation:


Simplifying
4a(a + -4) + -7a = a(4a + -3) + 20

Reorder the terms:
4a(-4 + a) + -7a = a(4a + -3) + 20
(-4 * 4a + a * 4a) + -7a = a(4a + -3) + 20
(-16a + 4a2) + -7a = a(4a + -3) + 20

Reorder the terms:
-16a + -7a + 4a2 = a(4a + -3) + 20

Combine like terms: -16a + -7a = -23a
-23a + 4a2 = a(4a + -3) + 20

Reorder the terms:
-23a + 4a2 = a(-3 + 4a) + 20
-23a + 4a2 = (-3 * a + 4a * a) + 20
-23a + 4a2 = (-3a + 4a2) + 20

Reorder the terms:
-23a + 4a2 = 20 + -3a + 4a2

Add '-4a2' to each side of the equation.
-23a + 4a2 + -4a2 = 20 + -3a + 4a2 + -4a2

Combine like terms: 4a2 + -4a2 = 0
-23a + 0 = 20 + -3a + 4a2 + -4a2
-23a = 20 + -3a + 4a2 + -4a2

Combine like terms: 4a2 + -4a2 = 0
-23a = 20 + -3a + 0
-23a = 20 + -3a

Solving
-23a = 20 + -3a

Solving for variable 'a'.

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

Add '3a' to each side of the equation.
-23a + 3a = 20 + -3a + 3a

Combine like terms: -23a + 3a = -20a
-20a = 20 + -3a + 3a

Combine like terms: -3a + 3a = 0
-20a = 20 + 0
-20a = 20

Divide each side by '-20'.
a = -1

Simplifying
a = -1

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