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I really need help for this...

What is

Please make a explanation for this! And uses it as your words.

And maybe you can show proof, how you got the answer...

I will give out brainliest, whoever answer this correctly!

Thanks~

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10