7-8[8-(5y-9)]=

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Solution for 7-8[8-(5y-9)]= equation:


Simplifying
7 + -8[8 + -1(5y + -9)] = 0

Reorder the terms:
7 + -8[8 + -1(-9 + 5y)] = 0
7 + -8[8 + (-9 * -1 + 5y * -1)] = 0
7 + -8[8 + (9 + -5y)] = 0

Combine like terms: 8 + 9 = 17
7 + -8[17 + -5y] = 0
7 + [17 * -8 + -5y * -8] = 0
7 + [-136 + 40y] = 0

Combine like terms: 7 + -136 = -129
-129 + 40y = 0

Solving
-129 + 40y = 0

Solving for variable 'y'.

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

Add '129' to each side of the equation.
-129 + 129 + 40y = 0 + 129

Combine like terms: -129 + 129 = 0
0 + 40y = 0 + 129
40y = 0 + 129

Combine like terms: 0 + 129 = 129
40y = 129

Divide each side by '40'.
y = 3.225

Simplifying
y = 3.225

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