3a^2+(-a-1)(3a+4)=4a-7

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Solution for 3a^2+(-a-1)(3a+4)=4a-7 equation:


Simplifying
3a2 + (-1a + -1)(3a + 4) = 4a + -7

Reorder the terms:
3a2 + (-1 + -1a)(3a + 4) = 4a + -7

Reorder the terms:
3a2 + (-1 + -1a)(4 + 3a) = 4a + -7

Multiply (-1 + -1a) * (4 + 3a)
3a2 + (-1(4 + 3a) + -1a * (4 + 3a)) = 4a + -7
3a2 + ((4 * -1 + 3a * -1) + -1a * (4 + 3a)) = 4a + -7
3a2 + ((-4 + -3a) + -1a * (4 + 3a)) = 4a + -7
3a2 + (-4 + -3a + (4 * -1a + 3a * -1a)) = 4a + -7
3a2 + (-4 + -3a + (-4a + -3a2)) = 4a + -7

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

Reorder the terms:
-4 + -7a + 3a2 + -3a2 = 4a + -7

Combine like terms: 3a2 + -3a2 = 0
-4 + -7a + 0 = 4a + -7
-4 + -7a = 4a + -7

Reorder the terms:
-4 + -7a = -7 + 4a

Solving
-4 + -7a = -7 + 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.
-4 + -7a + -4a = -7 + 4a + -4a

Combine like terms: -7a + -4a = -11a
-4 + -11a = -7 + 4a + -4a

Combine like terms: 4a + -4a = 0
-4 + -11a = -7 + 0
-4 + -11a = -7

Add '4' to each side of the equation.
-4 + 4 + -11a = -7 + 4

Combine like terms: -4 + 4 = 0
0 + -11a = -7 + 4
-11a = -7 + 4

Combine like terms: -7 + 4 = -3
-11a = -3

Divide each side by '-11'.
a = 0.2727272727

Simplifying
a = 0.2727272727

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