2x-4(x+1)=-13
1) we solve this equation:
2x-4(x+1)=-12
2x-4x-4=-12
-2x=-12+4
-2x=-8
x=-8/-2
x=4
2) we evalute x²-1
x²-1=4²-1=16-1=15
Answer: 15
Can you post a clearer pic
<span>-25(10-x)=25x+250
-250+25x=25x+250
-250+25x-25x=250
-250=250
??? cannot be solved as there is no variable left</span>
Answer:
A graph is below.
Step-by-step explanation: