Question

1. - 13 - 7 = 2 - 2m

Explanation:

Step1: Simplify left - hand side

$-13 - 7=-20$, so the equation becomes $-20 = 2-2m$.

Step2: Isolate the term with $m$

Add $2m$ to both sides: $2m - 20=2$.

Step3: Isolate the constant terms

Add 20 to both sides: $2m=2 + 20$, so $2m=22$.

Step4: Solve for $m$

Divide both sides by 2: $m=\frac{22}{2}=11$.

Answer:

$m = 11$