2(7-8)+4x=20

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Solution for 2(7-8)+4x=20 equation: 


Simplifying
2(7 + -8) + 4x = 20

Combine like terms: 7 + -8 = -1
2(-1) + 4x = 20

Multiply 2 * -1
-2 + 4x = 20

Solving
-2 + 4x = 20

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + 4x = 20 + 2

Combine like terms: -2 + 2 = 0
0 + 4x = 20 + 2
4x = 20 + 2

Combine like terms: 20 + 2 = 22
4x = 22

Divide each side by '4'.
x = 5.5

Simplifying
x = 5.5

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