8(x-7)+3x=21

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Solution for 8(x-7)+3x=21 equation:


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

Reorder the terms:
8(-7 + x) + 3x = 21
(-7 * 8 + x * 8) + 3x = 21
(-56 + 8x) + 3x = 21

Combine like terms: 8x + 3x = 11x
-56 + 11x = 21

Solving
-56 + 11x = 21

Solving for variable 'x'.

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

Add '56' to each side of the equation.
-56 + 56 + 11x = 21 + 56

Combine like terms: -56 + 56 = 0
0 + 11x = 21 + 56
11x = 21 + 56

Combine like terms: 21 + 56 = 77
11x = 77

Divide each side by '11'.
x = 7

Simplifying
x = 7

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