Question

{2m+10=3-(6m+5n)
{2(3m+2n)+9=4m+21

Answer 1

1) {2m+10=3-(6m+5n)
2m+10=3-6m-5n
2m+6m=3-5n-10
8m= -7-5n
m= -7/8 - 5/8n
m= -5/8n -7/8