9X+1-21X=9-7X-20

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Solution for 9X+1-21X=9-7X-20 equation:


Simplifying
9X + 1 + -21X = 9 + -7X + -20

Reorder the terms:
1 + 9X + -21X = 9 + -7X + -20

Combine like terms: 9X + -21X = -12X
1 + -12X = 9 + -7X + -20

Reorder the terms:
1 + -12X = 9 + -20 + -7X

Combine like terms: 9 + -20 = -11
1 + -12X = -11 + -7X

Solving
1 + -12X = -11 + -7X

Solving for variable 'X'.

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

Add '7X' to each side of the equation.
1 + -12X + 7X = -11 + -7X + 7X

Combine like terms: -12X + 7X = -5X
1 + -5X = -11 + -7X + 7X

Combine like terms: -7X + 7X = 0
1 + -5X = -11 + 0
1 + -5X = -11

Add '-1' to each side of the equation.
1 + -1 + -5X = -11 + -1

Combine like terms: 1 + -1 = 0
0 + -5X = -11 + -1
-5X = -11 + -1

Combine like terms: -11 + -1 = -12
-5X = -12

Divide each side by '-5'.
X = 2.4

Simplifying
X = 2.4

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