(90-z)+(180-z)=220

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Solution for (90-z)+(180-z)=220 equation:


Simplifying
(90 + -1z) + (180 + -1z) = 220

Remove parenthesis around (90 + -1z)
90 + -1z + (180 + -1z) = 220

Remove parenthesis around (180 + -1z)
90 + -1z + 180 + -1z = 220

Reorder the terms:
90 + 180 + -1z + -1z = 220

Combine like terms: 90 + 180 = 270
270 + -1z + -1z = 220

Combine like terms: -1z + -1z = -2z
270 + -2z = 220

Solving
270 + -2z = 220

Solving for variable 'z'.

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

Add '-270' to each side of the equation.
270 + -270 + -2z = 220 + -270

Combine like terms: 270 + -270 = 0
0 + -2z = 220 + -270
-2z = 220 + -270

Combine like terms: 220 + -270 = -50
-2z = -50

Divide each side by '-2'.
z = 25

Simplifying
z = 25

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