4(2y+3)-3y=-21

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Solution for 4(2y+3)-3y=-21 equation:


Simplifying
4(2y + 3) + -3y = -21

Reorder the terms:
4(3 + 2y) + -3y = -21
(3 * 4 + 2y * 4) + -3y = -21
(12 + 8y) + -3y = -21

Combine like terms: 8y + -3y = 5y
12 + 5y = -21

Solving
12 + 5y = -21

Solving for variable 'y'.

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

Add '-12' to each side of the equation.
12 + -12 + 5y = -21 + -12

Combine like terms: 12 + -12 = 0
0 + 5y = -21 + -12
5y = -21 + -12

Combine like terms: -21 + -12 = -33
5y = -33

Divide each side by '5'.
y = -6.6

Simplifying
y = -6.6

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