-7+4(1-9n)=-21

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Solution for -7+4(1-9n)=-21 equation:


Simplifying
-7 + 4(1 + -9n) = -21
-7 + (1 * 4 + -9n * 4) = -21
-7 + (4 + -36n) = -21

Combine like terms: -7 + 4 = -3
-3 + -36n = -21

Solving
-3 + -36n = -21

Solving for variable 'n'.

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

Add '3' to each side of the equation.
-3 + 3 + -36n = -21 + 3

Combine like terms: -3 + 3 = 0
0 + -36n = -21 + 3
-36n = -21 + 3

Combine like terms: -21 + 3 = -18
-36n = -18

Divide each side by '-36'.
n = 0.5

Simplifying
n = 0.5

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