[30-7x]=4

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Solution for [30-7x]=4 equation: 


Simplifying
[30 + -7x] = 4

Remove brackets around [30 + -7x]
30 + -7x = 4

Solving
30 + -7x = 4

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + -7x = 4 + -30

Combine like terms: 30 + -30 = 0
0 + -7x = 4 + -30
-7x = 4 + -30

Combine like terms: 4 + -30 = -26
-7x = -26

Divide each side by '-7'.
x = 3.714285714

Simplifying
x = 3.714285714

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