87-(7x+6)=7(x+3)+x

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Solution for 87-(7x+6)=7(x+3)+x equation:


Simplifying
87 + -1(7x + 6) = 7(x + 3) + x

Reorder the terms:
87 + -1(6 + 7x) = 7(x + 3) + x
87 + (6 * -1 + 7x * -1) = 7(x + 3) + x
87 + (-6 + -7x) = 7(x + 3) + x

Combine like terms: 87 + -6 = 81
81 + -7x = 7(x + 3) + x

Reorder the terms:
81 + -7x = 7(3 + x) + x
81 + -7x = (3 * 7 + x * 7) + x
81 + -7x = (21 + 7x) + x

Combine like terms: 7x + x = 8x
81 + -7x = 21 + 8x

Solving
81 + -7x = 21 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
81 + -7x + -8x = 21 + 8x + -8x

Combine like terms: -7x + -8x = -15x
81 + -15x = 21 + 8x + -8x

Combine like terms: 8x + -8x = 0
81 + -15x = 21 + 0
81 + -15x = 21

Add '-81' to each side of the equation.
81 + -81 + -15x = 21 + -81

Combine like terms: 81 + -81 = 0
0 + -15x = 21 + -81
-15x = 21 + -81

Combine like terms: 21 + -81 = -60
-15x = -60

Divide each side by '-15'.
x = 4

Simplifying
x = 4

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