-3(x+7)+8x=4

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Solution for -3(x+7)+8x=4 equation:


Simplifying
-3(x + 7) + 8x = 4

Reorder the terms:
-3(7 + x) + 8x = 4
(7 * -3 + x * -3) + 8x = 4
(-21 + -3x) + 8x = 4

Combine like terms: -3x + 8x = 5x
-21 + 5x = 4

Solving
-21 + 5x = 4

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 5x = 4 + 21

Combine like terms: -21 + 21 = 0
0 + 5x = 4 + 21
5x = 4 + 21

Combine like terms: 4 + 21 = 25
5x = 25

Divide each side by '5'.
x = 5

Simplifying
x = 5

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