0.3(21x-12)-(x+7)=

Solution for 0.3(21x-12)-(x+7)= equation:

Simplifying
0.3(21x + -12) + -1(x + 7) = 0

Reorder the terms:
0.3(-12 + 21x) + -1(x + 7) = 0
(-12 * 0.3 + 21x * 0.3) + -1(x + 7) = 0
(-3.6 + 6.3x) + -1(x + 7) = 0

Reorder the terms:
-3.6 + 6.3x + -1(7 + x) = 0
-3.6 + 6.3x + (7 * -1 + x * -1) = 0
-3.6 + 6.3x + (-7 + -1x) = 0

Reorder the terms:
-3.6 + -7 + 6.3x + -1x = 0

Combine like terms: -3.6 + -7 = -10.6
-10.6 + 6.3x + -1x = 0

Combine like terms: 6.3x + -1x = 5.3x
-10.6 + 5.3x = 0

Solving
-10.6 + 5.3x = 0

Solving for variable 'x'.

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

Add '10.6' to each side of the equation.
-10.6 + 10.6 + 5.3x = 0 + 10.6

Combine like terms: -10.6 + 10.6 = 0.0
0.0 + 5.3x = 0 + 10.6
5.3x = 0 + 10.6

Combine like terms: 0 + 10.6 = 10.6
5.3x = 10.6

Divide each side by '5.3'.
x = 2

Simplifying
x = 2