8*4=[y+7]-[y*3]

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Solution for 8*4=[y+7]-[y*3] equation:


Simplifying
8 * 4 = [y + 7] + -1[y * 3]

Multiply 8 * 4
32 = [y + 7] + -1[y * 3]

Reorder the terms:
32 = [7 + y] + -1[y * 3]

Remove brackets around [7 + y]
32 = 7 + y + -1[y * 3]

Reorder the terms for easier multiplication:
32 = 7 + y + -1[3y]

Remove brackets around [3y]
32 = 7 + y + -1 * 3y

Multiply -1 * 3
32 = 7 + y + -3y

Combine like terms: y + -3y = -2y
32 = 7 + -2y

Solving
32 = 7 + -2y

Solving for variable 'y'.

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

Add '2y' to each side of the equation.
32 + 2y = 7 + -2y + 2y

Combine like terms: -2y + 2y = 0
32 + 2y = 7 + 0
32 + 2y = 7

Add '-32' to each side of the equation.
32 + -32 + 2y = 7 + -32

Combine like terms: 32 + -32 = 0
0 + 2y = 7 + -32
2y = 7 + -32

Combine like terms: 7 + -32 = -25
2y = -25

Divide each side by '2'.
y = -12.5

Simplifying
y = -12.5

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