## Sarah_Miller720 Group Title I need help figuring out this equation. 7(2b – 5) + 3 = 10 one year ago one year ago

1. merpersmeeps

I think it would be 14b - 35 +3 = 10 so, 14b-38=10 14b=48

2. JayDS

yes what merp has shown is correct, but do u understand it? 1) Always expand out the brackets first. then collect like terms and rearrange to solve for your unknown.

3. Sarah_Miller720

so my answer would be b=3 then right?

4. JayDS

nope. try again.

5. Sarah_Miller720

okay give me a minute

6. JayDS

the figure is right but it's not exactly 3, can you see that 14 is not a factor of 48? so it can't be a whole number.

7. Sarah_Miller720

b=42?

8. JayDS

nono.

9. JayDS

7(2b – 5) + 3 = 10 expand brackets. 14b - 35 + 3 = 10 collect like terms. 14b -32 = 10 bring -32 over to RHS 14b = 10+32 14b = 42 solve for b using inverse of operation 14 times b = 42 b = 42 divided by 14

10. JayDS

merp, who showed u the working above, made an error so follow my working out.

11. Sarah_Miller720

i got 3

12. JayDS

u are right.

13. Sarah_Miller720

lol i asked you if it was 3 above and you said no..

14. JayDS

sorry, I was following merp's working out.

15. JayDS

and I just figured out her working out was wrong just then when I showed u my solution.

16. Sarah_Miller720

that's ok :)

17. JayDS

:) at least u understand how to do it.