4(2y+9)+7y=-21

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Solution for 4(2y+9)+7y=-21 equation: 


Simplifying
4(2y + 9) + 7y = -21

Reorder the terms:
4(9 + 2y) + 7y = -21
(9 * 4 + 2y * 4) + 7y = -21
(36 + 8y) + 7y = -21

Combine like terms: 8y + 7y = 15y
36 + 15y = -21

Solving
36 + 15y = -21

Solving for variable 'y'.

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

Add '-36' to each side of the equation.
36 + -36 + 15y = -21 + -36

Combine like terms: 36 + -36 = 0
0 + 15y = -21 + -36
15y = -21 + -36

Combine like terms: -21 + -36 = -57
15y = -57

Divide each side by '15'.
y = -3.8

Simplifying
y = -3.8

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