84=3(5x-7)

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Solution for 84=3(5x-7) equation:


Simplifying
84 = 3(5x + -7)

Reorder the terms:
84 = 3(-7 + 5x)
84 = (-7 * 3 + 5x * 3)
84 = (-21 + 15x)

Solving
84 = -21 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
84 + -15x = -21 + 15x + -15x

Combine like terms: 15x + -15x = 0
84 + -15x = -21 + 0
84 + -15x = -21

Add '-84' to each side of the equation.
84 + -84 + -15x = -21 + -84

Combine like terms: 84 + -84 = 0
0 + -15x = -21 + -84
-15x = -21 + -84

Combine like terms: -21 + -84 = -105
-15x = -105

Divide each side by '-15'.
x = 7

Simplifying
x = 7

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