x+y+z+a+90+80=100

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Solution for x+y+z+a+90+80=100 equation:


Simplifying
x + y + z + a + 90 + 80 = 100

Reorder the terms:
90 + 80 + a + x + y + z = 100

Combine like terms: 90 + 80 = 170
170 + a + x + y + z = 100

Solving
170 + a + x + y + z = 100

Solving for variable 'a'.

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

Add '-170' to each side of the equation.
170 + a + x + y + -170 + z = 100 + -170

Reorder the terms:
170 + -170 + a + x + y + z = 100 + -170

Combine like terms: 170 + -170 = 0
0 + a + x + y + z = 100 + -170
a + x + y + z = 100 + -170

Combine like terms: 100 + -170 = -70
a + x + y + z = -70

Add '-1x' to each side of the equation.
a + x + y + -1x + z = -70 + -1x

Reorder the terms:
a + x + -1x + y + z = -70 + -1x

Combine like terms: x + -1x = 0
a + 0 + y + z = -70 + -1x
a + y + z = -70 + -1x

Add '-1y' to each side of the equation.
a + y + -1y + z = -70 + -1x + -1y

Combine like terms: y + -1y = 0
a + 0 + z = -70 + -1x + -1y
a + z = -70 + -1x + -1y

Add '-1z' to each side of the equation.
a + z + -1z = -70 + -1x + -1y + -1z

Combine like terms: z + -1z = 0
a + 0 = -70 + -1x + -1y + -1z
a = -70 + -1x + -1y + -1z

Simplifying
a = -70 + -1x + -1y + -1z

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