3(7-4x)+3(x-2x)=4

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Solution for 3(7-4x)+3(x-2x)=4 equation: 


Simplifying
3(7 + -4x) + 3(x + -2x) = 4
(7 * 3 + -4x * 3) + 3(x + -2x) = 4
(21 + -12x) + 3(x + -2x) = 4

Combine like terms: x + -2x = -1x
21 + -12x + 3(-1x) = 4

Remove parenthesis around (-1x)
21 + -12x + 3 * -1x = 4

Multiply 3 * -1
21 + -12x + -3x = 4

Combine like terms: -12x + -3x = -15x
21 + -15x = 4

Solving
21 + -15x = 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 + -15x = 4 + -21

Combine like terms: 21 + -21 = 0
0 + -15x = 4 + -21
-15x = 4 + -21

Combine like terms: 4 + -21 = -17
-15x = -17

Divide each side by '-15'.
x = 1.133333333

Simplifying
x = 1.133333333

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