Becky and Tommy are asked to solve –4x – 25 = 8x + 15. Identify where one of the

Mathematics
Tutor: None Selected Time limit: 1 Day

Becky
Tommy
–4x – 25 = 8x + 15
–4x – 25 – 8x = 8x + 15 – 8x
–12x – 25 = 15
-12x – 25 + 25 = 15 + 25
–12x = 40
 
–4x – 25 = 8x + 15
–4x – 25 + 4x = 8x + 15 + 4x
–25 = 12x + 15
–25 – 15 = 12x + 15 – 15
–40 = 12x
 
(1 point)  
Question 2 options:
May 29th, 2015

-4x-25=8x+15

-4x-8x=25+15

-12x=40

-3.333333=x

1 is correct you subtract 8 or you add 4 so options 1 and 3 are right and 4 is right as well and that leaves 2 in which you divide by 12 and not by 40

the answer is 2

May 29th, 2015

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