3(7-3y)+8y=17

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Solution for 3(7-3y)+8y=17 equation: 


Simplifying
3(7 + -3y) + 8y = 17
(7 * 3 + -3y * 3) + 8y = 17
(21 + -9y) + 8y = 17

Combine like terms: -9y + 8y = -1y
21 + -1y = 17

Solving
21 + -1y = 17

Solving for variable 'y'.

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

Add '-21' to each side of the equation.
21 + -21 + -1y = 17 + -21

Combine like terms: 21 + -21 = 0
0 + -1y = 17 + -21
-1y = 17 + -21

Combine like terms: 17 + -21 = -4
-1y = -4

Divide each side by '-1'.
y = 4

Simplifying
y = 4

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