3(4y-21)=7

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Solution for 3(4y-21)=7 equation: 


Simplifying
3(4y + -21) = 7

Reorder the terms:
3(-21 + 4y) = 7
(-21 * 3 + 4y * 3) = 7
(-63 + 12y) = 7

Solving
-63 + 12y = 7

Solving for variable 'y'.

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

Add '63' to each side of the equation.
-63 + 63 + 12y = 7 + 63

Combine like terms: -63 + 63 = 0
0 + 12y = 7 + 63
12y = 7 + 63

Combine like terms: 7 + 63 = 70
12y = 70

Divide each side by '12'.
y = 5.833333333

Simplifying
y = 5.833333333

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