90-(42-x)=

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Solution for 90-(42-x)= equation:


Simplifying
90 + -1(42 + -1x) = 0
90 + (42 * -1 + -1x * -1) = 0
90 + (-42 + 1x) = 0

Combine like terms: 90 + -42 = 48
48 + 1x = 0

Solving
48 + 1x = 0

Solving for variable 'x'.

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

Add '-48' to each side of the equation.
48 + -48 + 1x = 0 + -48

Combine like terms: 48 + -48 = 0
0 + 1x = 0 + -48
1x = 0 + -48

Combine like terms: 0 + -48 = -48
1x = -48

Divide each side by '1'.
x = -48

Simplifying
x = -48

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