y-(y+2)=7-(2y+1)

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Solution for y-(y+2)=7-(2y+1) equation:


Simplifying
y + -1(y + 2) = 7 + -1(2y + 1)

Reorder the terms:
y + -1(2 + y) = 7 + -1(2y + 1)
y + (2 * -1 + y * -1) = 7 + -1(2y + 1)
y + (-2 + -1y) = 7 + -1(2y + 1)

Reorder the terms:
-2 + y + -1y = 7 + -1(2y + 1)

Combine like terms: y + -1y = 0
-2 + 0 = 7 + -1(2y + 1)
-2 = 7 + -1(2y + 1)

Reorder the terms:
-2 = 7 + -1(1 + 2y)
-2 = 7 + (1 * -1 + 2y * -1)
-2 = 7 + (-1 + -2y)

Combine like terms: 7 + -1 = 6
-2 = 6 + -2y

Solving
-2 = 6 + -2y

Solving for variable 'y'.

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

Add '2y' to each side of the equation.
-2 + 2y = 6 + -2y + 2y

Combine like terms: -2y + 2y = 0
-2 + 2y = 6 + 0
-2 + 2y = 6

Add '2' to each side of the equation.
-2 + 2 + 2y = 6 + 2

Combine like terms: -2 + 2 = 0
0 + 2y = 6 + 2
2y = 6 + 2

Combine like terms: 6 + 2 = 8
2y = 8

Divide each side by '2'.
y = 4

Simplifying
y = 4

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