4-5(1+7x)=-21

Solution for 4-5(1+7x)=-21 equation:

Simplifying
4 + -5(1 + 7x) = -21
4 + (1 * -5 + 7x * -5) = -21
4 + (-5 + -35x) = -21

Combine like terms: 4 + -5 = -1
-1 + -35x = -21

Solving
-1 + -35x = -21

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + -35x = -21 + 1

Combine like terms: -1 + 1 = 0
0 + -35x = -21 + 1
-35x = -21 + 1

Combine like terms: -21 + 1 = -20
-35x = -20

Divide each side by '-35'.
x = 0.5714285714

Simplifying
x = 0.5714285714