## tiff9702 one year ago http://alphaplustesting.org/TestQuestions/maths-questions/st-maths7-ex1.2-q7.png HELP!!

1. tiff9702

I think It is D

2. Nnesha

why do you think its D ? explain :=)

3. tiff9702

That is the way I Interperate it

4. Nnesha

did you solve for x or did you apply substitution method ?

5. tiff9702

I worked backwards

6. tiff9702

I did $-45+9$ and then i did$-6\times6$

7. Nnesha

to check ur answer substitute x for 6$-6(6)-9=-45$ if both sides are equal then yes 6 is the answer if both sides are not equal then no

8. Nnesha

first step is right add 9 both sides but why did you multiply by 6?

9. tiff9702

Both times I got 36 so I assumed if I added 9 to $-6\times6$ i would get -45

10. Nnesha

alright first step add 9 both sides |dw:1441036121395:dw| now divide both sides by -

11. Nnesha

yes right

12. Nnesha

-6 times 6=-36 -36-9 = -45 both sides areequal good to go!