1(x+21)=-42

Solution for 1(x+21)=-42 equation:

Simplifying
1(x + 21) = -42

Reorder the terms:
1(21 + x) = -42
(21 * 1 + x * 1) = -42
(21 + 1x) = -42

Solving
21 + 1x = -42

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 + 1x = -42 + -21

Combine like terms: 21 + -21 = 0
0 + 1x = -42 + -21
1x = -42 + -21

Combine like terms: -42 + -21 = -63
1x = -63

Divide each side by '1'.
x = -63

Simplifying
x = -63