1000-21=x+9

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Solution for 1000-21=x+9 equation:


Simplifying
1000 + -21 = x + 9

Combine like terms: 1000 + -21 = 979
979 = x + 9

Reorder the terms:
979 = 9 + x

Solving
979 = 9 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
979 + -1x = 9 + x + -1x

Combine like terms: x + -1x = 0
979 + -1x = 9 + 0
979 + -1x = 9

Add '-979' to each side of the equation.
979 + -979 + -1x = 9 + -979

Combine like terms: 979 + -979 = 0
0 + -1x = 9 + -979
-1x = 9 + -979

Combine like terms: 9 + -979 = -970
-1x = -970

Divide each side by '-1'.
x = 970

Simplifying
x = 970

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