87=5(3+x)+4x

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Solution for 87=5(3+x)+4x equation:


Simplifying
87 = 5(3 + x) + 4x
87 = (3 * 5 + x * 5) + 4x
87 = (15 + 5x) + 4x

Combine like terms: 5x + 4x = 9x
87 = 15 + 9x

Solving
87 = 15 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
87 + -9x = 15 + 9x + -9x

Combine like terms: 9x + -9x = 0
87 + -9x = 15 + 0
87 + -9x = 15

Add '-87' to each side of the equation.
87 + -87 + -9x = 15 + -87

Combine like terms: 87 + -87 = 0
0 + -9x = 15 + -87
-9x = 15 + -87

Combine like terms: 15 + -87 = -72
-9x = -72

Divide each side by '-9'.
x = 8

Simplifying
x = 8

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