For #7 - part a: greatest common factor (GCF) is 5.
Part b: cross out everything BUT 10 & 20.
Answer: x=3
Step-by-step explanation: Subtract 6 from both sides, Simplify
15−6 to 9, and then divide both sides by three.
3x=15−6
3x=9
x=9/3
x=3
Hope this helps, have a BLESSED day! ☺️
It’s A!! hope that helped