7x+3(6-x)+39=10x+21

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Solution for 7x+3(6-x)+39=10x+21 equation:


Simplifying
7x + 3(6 + -1x) + 39 = 10x + 21
7x + (6 * 3 + -1x * 3) + 39 = 10x + 21
7x + (18 + -3x) + 39 = 10x + 21

Reorder the terms:
18 + 39 + 7x + -3x = 10x + 21

Combine like terms: 18 + 39 = 57
57 + 7x + -3x = 10x + 21

Combine like terms: 7x + -3x = 4x
57 + 4x = 10x + 21

Reorder the terms:
57 + 4x = 21 + 10x

Solving
57 + 4x = 21 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
57 + 4x + -10x = 21 + 10x + -10x

Combine like terms: 4x + -10x = -6x
57 + -6x = 21 + 10x + -10x

Combine like terms: 10x + -10x = 0
57 + -6x = 21 + 0
57 + -6x = 21

Add '-57' to each side of the equation.
57 + -57 + -6x = 21 + -57

Combine like terms: 57 + -57 = 0
0 + -6x = 21 + -57
-6x = 21 + -57

Combine like terms: 21 + -57 = -36
-6x = -36

Divide each side by '-6'.
x = 6

Simplifying
x = 6

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