3x-21-7x+20=

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Solution for 3x-21-7x+20= equation:


Simplifying
3x + -21 + -7x + 20 = 0

Reorder the terms:
-21 + 20 + 3x + -7x = 0

Combine like terms: -21 + 20 = -1
-1 + 3x + -7x = 0

Combine like terms: 3x + -7x = -4x
-1 + -4x = 0

Solving
-1 + -4x = 0

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + -4x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -4x = 0 + 1
-4x = 0 + 1

Combine like terms: 0 + 1 = 1
-4x = 1

Divide each side by '-4'.
x = -0.25

Simplifying
x = -0.25

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