x-2(4x+5)=40

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Solution for x-2(4x+5)=40 equation:


Simplifying
x + -2(4x + 5) = 40

Reorder the terms:
x + -2(5 + 4x) = 40
x + (5 * -2 + 4x * -2) = 40
x + (-10 + -8x) = 40

Reorder the terms:
-10 + x + -8x = 40

Combine like terms: x + -8x = -7x
-10 + -7x = 40

Solving
-10 + -7x = 40

Solving for variable 'x'.

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

Add '10' to each side of the equation.
-10 + 10 + -7x = 40 + 10

Combine like terms: -10 + 10 = 0
0 + -7x = 40 + 10
-7x = 40 + 10

Combine like terms: 40 + 10 = 50
-7x = 50

Divide each side by '-7'.
x = -7.142857143

Simplifying
x = -7.142857143

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