Hello there! :D
Find the scale of the sides.
40/5=8 (the longer side is 8 times bigger than the shorter one)
3*8= 24
2x+10=24
Subtract 10 on both sides.
2x=14
Divide by two on both sides.
x=7
I hope this helps!
~kaikers
It depends, for what equation you want to write. Like, do you want to do addition or subtraction? I usually use like my everyday life to represent a real-world situation problem. For example, Amber have 30 bags of chips, she ate 10 bags. How many bags does she have left? Answer: 20 bags (30 - 10 = 20)