4-7=18-x

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Solution for 4-7=18-x equation:


Simplifying
4 + -7 = 18 + -1x

Combine like terms: 4 + -7 = -3
-3 = 18 + -1x

Solving
-3 = 18 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
-3 + x = 18 + -1x + x

Combine like terms: -1x + x = 0
-3 + x = 18 + 0
-3 + x = 18

Add '3' to each side of the equation.
-3 + 3 + x = 18 + 3

Combine like terms: -3 + 3 = 0
0 + x = 18 + 3
x = 18 + 3

Combine like terms: 18 + 3 = 21
x = 21

Simplifying
x = 21

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