8x+7-x+5=4x+12-(x-30)

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Solution for 8x+7-x+5=4x+12-(x-30) equation:


Simplifying
8x + 7 + -1x + 5 = 4x + 12 + -1(x + -30)

Reorder the terms:
7 + 5 + 8x + -1x = 4x + 12 + -1(x + -30)

Combine like terms: 7 + 5 = 12
12 + 8x + -1x = 4x + 12 + -1(x + -30)

Combine like terms: 8x + -1x = 7x
12 + 7x = 4x + 12 + -1(x + -30)

Reorder the terms:
12 + 7x = 4x + 12 + -1(-30 + x)
12 + 7x = 4x + 12 + (-30 * -1 + x * -1)
12 + 7x = 4x + 12 + (30 + -1x)

Reorder the terms:
12 + 7x = 12 + 30 + 4x + -1x

Combine like terms: 12 + 30 = 42
12 + 7x = 42 + 4x + -1x

Combine like terms: 4x + -1x = 3x
12 + 7x = 42 + 3x

Solving
12 + 7x = 42 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
12 + 7x + -3x = 42 + 3x + -3x

Combine like terms: 7x + -3x = 4x
12 + 4x = 42 + 3x + -3x

Combine like terms: 3x + -3x = 0
12 + 4x = 42 + 0
12 + 4x = 42

Add '-12' to each side of the equation.
12 + -12 + 4x = 42 + -12

Combine like terms: 12 + -12 = 0
0 + 4x = 42 + -12
4x = 42 + -12

Combine like terms: 42 + -12 = 30
4x = 30

Divide each side by '4'.
x = 7.5

Simplifying
x = 7.5

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