{Pic attached} I AM MARKING BRAINLIEST ASAP TO THE PERSON WHO ANSWERS WITH AN EXPLANATION! PLEASE HELP.

Answer:
7 [tex]\frac{9}{10}[/tex]
Step-by-step explanation:
First find the LCM between both denominators, in which this situation is 10.
4 + 3 = 7
Multiply the first fraction, both sides (top and bottom) by 2
[tex]\frac{6}{10} +\frac{3}{10} = \frac{9}{10}[/tex]