4x-7(3x+15)=-20

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Solution for 4x-7(3x+15)=-20 equation:


Simplifying
4x + -7(3x + 15) = -20

Reorder the terms:
4x + -7(15 + 3x) = -20
4x + (15 * -7 + 3x * -7) = -20
4x + (-105 + -21x) = -20

Reorder the terms:
-105 + 4x + -21x = -20

Combine like terms: 4x + -21x = -17x
-105 + -17x = -20

Solving
-105 + -17x = -20

Solving for variable 'x'.

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

Add '105' to each side of the equation.
-105 + 105 + -17x = -20 + 105

Combine like terms: -105 + 105 = 0
0 + -17x = -20 + 105
-17x = -20 + 105

Combine like terms: -20 + 105 = 85
-17x = 85

Divide each side by '-17'.
x = -5

Simplifying
x = -5

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