15-20x=7-(4-x)

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Solution for 15-20x=7-(4-x) equation:


Simplifying
15 + -20x = 7 + -1(4 + -1x)
15 + -20x = 7 + (4 * -1 + -1x * -1)
15 + -20x = 7 + (-4 + 1x)

Combine like terms: 7 + -4 = 3
15 + -20x = 3 + 1x

Solving
15 + -20x = 3 + 1x

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.
15 + -20x + -1x = 3 + 1x + -1x

Combine like terms: -20x + -1x = -21x
15 + -21x = 3 + 1x + -1x

Combine like terms: 1x + -1x = 0
15 + -21x = 3 + 0
15 + -21x = 3

Add '-15' to each side of the equation.
15 + -15 + -21x = 3 + -15

Combine like terms: 15 + -15 = 0
0 + -21x = 3 + -15
-21x = 3 + -15

Combine like terms: 3 + -15 = -12
-21x = -12

Divide each side by '-21'.
x = 0.5714285714

Simplifying
x = 0.5714285714

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