## anonymous one year ago The sum of what and 7x2 is 10x2.

1. anonymous

6? xD

2. anonymous

7*2 = 14 10*2 = 20 20-14= 6

3. anonymous

4. anonymous

|dw:1442954214634:dw|

5. ♪Chibiterasu

I think he means: $7x^2$

6. ♪Chibiterasu

and $10x^2$

7. calculusxy

$\large x + (7 \times 2) = 10 \times 2$ $\large x + 14 = 20$ $\large x + 14 - 14 = 20 - 14$ $\large x = 6$

8. ♪Chibiterasu

I am 100% sure he is using exponents.

9. calculusxy

if it is the case that @♪Chibiterasu is mentioning, then we have now: $\large x + 7x^2 = 10x^2$ $\large x + 7x^2 - 7x^2 = 10x^2 - 7x^2$ $\large x = 3x^2$

10. ♪Chibiterasu

Yeahhhh they have the same variable so it's pretty straight-forward.