7(x-1)=21-3(x+1)

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Solution for 7(x-1)=21-3(x+1) equation:


Simplifying
7(x + -1) = 21 + -3(x + 1)

Reorder the terms:
7(-1 + x) = 21 + -3(x + 1)
(-1 * 7 + x * 7) = 21 + -3(x + 1)
(-7 + 7x) = 21 + -3(x + 1)

Reorder the terms:
-7 + 7x = 21 + -3(1 + x)
-7 + 7x = 21 + (1 * -3 + x * -3)
-7 + 7x = 21 + (-3 + -3x)

Combine like terms: 21 + -3 = 18
-7 + 7x = 18 + -3x

Solving
-7 + 7x = 18 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
-7 + 7x + 3x = 18 + -3x + 3x

Combine like terms: 7x + 3x = 10x
-7 + 10x = 18 + -3x + 3x

Combine like terms: -3x + 3x = 0
-7 + 10x = 18 + 0
-7 + 10x = 18

Add '7' to each side of the equation.
-7 + 7 + 10x = 18 + 7

Combine like terms: -7 + 7 = 0
0 + 10x = 18 + 7
10x = 18 + 7

Combine like terms: 18 + 7 = 25
10x = 25

Divide each side by '10'.
x = 2.5

Simplifying
x = 2.5

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