7(5x-1)=21(x+1)

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Solution for 7(5x-1)=21(x+1) equation:


Simplifying
7(5x + -1) = 21(x + 1)

Reorder the terms:
7(-1 + 5x) = 21(x + 1)
(-1 * 7 + 5x * 7) = 21(x + 1)
(-7 + 35x) = 21(x + 1)

Reorder the terms:
-7 + 35x = 21(1 + x)
-7 + 35x = (1 * 21 + x * 21)
-7 + 35x = (21 + 21x)

Solving
-7 + 35x = 21 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
-7 + 35x + -21x = 21 + 21x + -21x

Combine like terms: 35x + -21x = 14x
-7 + 14x = 21 + 21x + -21x

Combine like terms: 21x + -21x = 0
-7 + 14x = 21 + 0
-7 + 14x = 21

Add '7' to each side of the equation.
-7 + 7 + 14x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 14x = 21 + 7
14x = 21 + 7

Combine like terms: 21 + 7 = 28
14x = 28

Divide each side by '14'.
x = 2

Simplifying
x = 2

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