3(x+7)-4(2x+1)=12

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Solution for 3(x+7)-4(2x+1)=12 equation:


Simplifying
3(x + 7) + -4(2x + 1) = 12

Reorder the terms:
3(7 + x) + -4(2x + 1) = 12
(7 * 3 + x * 3) + -4(2x + 1) = 12
(21 + 3x) + -4(2x + 1) = 12

Reorder the terms:
21 + 3x + -4(1 + 2x) = 12
21 + 3x + (1 * -4 + 2x * -4) = 12
21 + 3x + (-4 + -8x) = 12

Reorder the terms:
21 + -4 + 3x + -8x = 12

Combine like terms: 21 + -4 = 17
17 + 3x + -8x = 12

Combine like terms: 3x + -8x = -5x
17 + -5x = 12

Solving
17 + -5x = 12

Solving for variable 'x'.

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

Add '-17' to each side of the equation.
17 + -17 + -5x = 12 + -17

Combine like terms: 17 + -17 = 0
0 + -5x = 12 + -17
-5x = 12 + -17

Combine like terms: 12 + -17 = -5
-5x = -5

Divide each side by '-5'.
x = 1

Simplifying
x = 1

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