30=8x-(x-4)

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Solution for 30=8x-(x-4) equation:


Simplifying
30 = 8x + -1(x + -4)

Reorder the terms:
30 = 8x + -1(-4 + x)
30 = 8x + (-4 * -1 + x * -1)
30 = 8x + (4 + -1x)

Reorder the terms:
30 = 4 + 8x + -1x

Combine like terms: 8x + -1x = 7x
30 = 4 + 7x

Solving
30 = 4 + 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.
30 + -7x = 4 + 7x + -7x

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

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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