2(y-3)+7=21

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Solution for 2(y-3)+7=21 equation:


Simplifying
2(y + -3) + 7 = 21

Reorder the terms:
2(-3 + y) + 7 = 21
(-3 * 2 + y * 2) + 7 = 21
(-6 + 2y) + 7 = 21

Reorder the terms:
-6 + 7 + 2y = 21

Combine like terms: -6 + 7 = 1
1 + 2y = 21

Solving
1 + 2y = 21

Solving for variable 'y'.

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

Add '-1' to each side of the equation.
1 + -1 + 2y = 21 + -1

Combine like terms: 1 + -1 = 0
0 + 2y = 21 + -1
2y = 21 + -1

Combine like terms: 21 + -1 = 20
2y = 20

Divide each side by '2'.
y = 10

Simplifying
y = 10

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