Question 68346
-3(3X+15)-(10+X)=35
-9X-45-10-X=35
-10X=35+45+10
-10X=90
X=90/-10
X=-9
PROOF
-3(3*-9+15)-(10-9)=35
-3(-27+15)-1=35
-3(-12)-1=35
36-1=35
35=35