Answer :
X=-12
-10x+1+7x=37
(-10x+7x)+1=37
-3x=37-1
-3x=36
X=36/-3
X=-12
Check
-10(-12)+1+7(-12)=37
120+1-84=37
37=37
-10x+1+7x=37
(-10x+7x)+1=37
-3x=37-1
-3x=36
X=36/-3
X=-12
Check
-10(-12)+1+7(-12)=37
120+1-84=37
37=37
