21(5m+19)=21(6m+12)

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Solution for 21(5m+19)=21(6m+12) equation:


Simplifying
21(5m + 19) = 21(6m + 12)

Reorder the terms:
21(19 + 5m) = 21(6m + 12)
(19 * 21 + 5m * 21) = 21(6m + 12)
(399 + 105m) = 21(6m + 12)

Reorder the terms:
399 + 105m = 21(12 + 6m)
399 + 105m = (12 * 21 + 6m * 21)
399 + 105m = (252 + 126m)

Solving
399 + 105m = 252 + 126m

Solving for variable 'm'.

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

Add '-126m' to each side of the equation.
399 + 105m + -126m = 252 + 126m + -126m

Combine like terms: 105m + -126m = -21m
399 + -21m = 252 + 126m + -126m

Combine like terms: 126m + -126m = 0
399 + -21m = 252 + 0
399 + -21m = 252

Add '-399' to each side of the equation.
399 + -399 + -21m = 252 + -399

Combine like terms: 399 + -399 = 0
0 + -21m = 252 + -399
-21m = 252 + -399

Combine like terms: 252 + -399 = -147
-21m = -147

Divide each side by '-21'.
m = 7

Simplifying
m = 7

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