40
8x5=40
10x4=40
Hope this helps
Answer:
Because (-x²+2x+3)+(-x²-2x-1) = -x²+2x+3-x²-2x-1 = -2x²+2
Step-by-step explanation:
Hope It Helps!
Hello there!

Explanation:
↓↓↓↓↓↓↓↓↓↓↓↓
First you had to subtract by 7 from both sides of the equation.

Simplify

Then you add by x from both sides of the equation.

Simplify

Divide by 4 from both sides of the equation.

Simplify it should be the correct answer.

Answer⇒⇒⇒x=-2
Hope this helps!
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-Charlie