Answer:
-(1+7x)-6(-7-x)=26
-1-7x+42+6x=26
-x+41=26
-x=26-41
-x=-15
x=15
hope it helps you!
Step-by-step explanation:
-1 - 7x + 42 + 6x = 26
41 -7x + 6x = 26
41 - x =26
-x = 26 - 41
-x = -15
x = 15
