4x+5(-1x)=7

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Solution for 4x+5(-1x)=7 equation: 


Simplifying
4x + 5(-1x) = 7

Remove parenthesis around (-1x)
4x + 5 * -1x = 7

Multiply 5 * -1
4x + -5x = 7

Combine like terms: 4x + -5x = -1x
-1x = 7

Solving
-1x = 7

Solving for variable 'x'.

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

Divide each side by '-1'.
x = -7

Simplifying
x = -7

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