-7(3+m)=210

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Solution for -7(3+m)=210 equation: 


Simplifying
-7(3 + m) = 210
(3 * -7 + m * -7) = 210
(-21 + -7m) = 210

Solving
-21 + -7m = 210

Solving for variable 'm'.

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

Add '21' to each side of the equation.
-21 + 21 + -7m = 210 + 21

Combine like terms: -21 + 21 = 0
0 + -7m = 210 + 21
-7m = 210 + 21

Combine like terms: 210 + 21 = 231
-7m = 231

Divide each side by '-7'.
m = -33

Simplifying
m = -33

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