7y-2(8+1)=4

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Solution for 7y-2(8+1)=4 equation:


Simplifying
7y + -2(8 + 1) = 4

Combine like terms: 8 + 1 = 9
7y + -2(9) = 4

Multiply -2 * 9
7y + -18 = 4

Reorder the terms:
-18 + 7y = 4

Solving
-18 + 7y = 4

Solving for variable 'y'.

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

Add '18' to each side of the equation.
-18 + 18 + 7y = 4 + 18

Combine like terms: -18 + 18 = 0
0 + 7y = 4 + 18
7y = 4 + 18

Combine like terms: 4 + 18 = 22
7y = 22

Divide each side by '7'.
y = 3.142857143

Simplifying
y = 3.142857143

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