20+12x+(-13)+(-21x)=

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Solution for 20+12x+(-13)+(-21x)= equation:


Simplifying
20 + 12x + (-13) + (-21x) = 0
20 + 12x + -13 + (-21x) = 0

Reorder the terms:
20 + -13 + 12x + (-21x) = 0

Combine like terms: 20 + -13 = 7
7 + 12x + (-21x) = 0

Combine like terms: 12x + (-21x) = -9x
7 + -9x = 0

Solving
7 + -9x = 0

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + -9x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -9x = 0 + -7
-9x = 0 + -7

Combine like terms: 0 + -7 = -7
-9x = -7

Divide each side by '-9'.
x = 0.7777777778

Simplifying
x = 0.7777777778

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