2.5[x+3(x+7)]=

Solution for 2.5[x+3(x+7)]= equation:

Simplifying
2.5[x + 3(x + 7)] = 0

Reorder the terms:
2.5[x + 3(7 + x)] = 0
2.5[x + (7 * 3 + x * 3)] = 0
2.5[x + (21 + 3x)] = 0

Reorder the terms:
2.5[21 + x + 3x] = 0

Combine like terms: x + 3x = 4x
2.5[21 + 4x] = 0
[21 * 2.5 + 4x * 2.5] = 0
[52.5 + 10x] = 0

Solving
52.5 + 10x = 0

Solving for variable 'x'.

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

Add '-52.5' to each side of the equation.
52.5 + -52.5 + 10x = 0 + -52.5

Combine like terms: 52.5 + -52.5 = 0.0
0.0 + 10x = 0 + -52.5
10x = 0 + -52.5

Combine like terms: 0 + -52.5 = -52.5
10x = -52.5

Divide each side by '10'.
x = -5.25

Simplifying
x = -5.25