8x+21=3x+7*4

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Solution for 8x+21=3x+7*4 equation:


Simplifying
8x + 21 = 3x + 7 * 4

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

Multiply 7 * 4
21 + 8x = 3x + 28

Reorder the terms:
21 + 8x = 28 + 3x

Solving
21 + 8x = 28 + 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.
21 + 8x + -3x = 28 + 3x + -3x

Combine like terms: 8x + -3x = 5x
21 + 5x = 28 + 3x + -3x

Combine like terms: 3x + -3x = 0
21 + 5x = 28 + 0
21 + 5x = 28

Add '-21' to each side of the equation.
21 + -21 + 5x = 28 + -21

Combine like terms: 21 + -21 = 0
0 + 5x = 28 + -21
5x = 28 + -21

Combine like terms: 28 + -21 = 7
5x = 7

Divide each side by '5'.
x = 1.4

Simplifying
x = 1.4

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