Answer:
135
Step-by-step explanation:
Well 3 friends and 45 dollars each
45*3=135
(3x-9) +(x+19)+x=180
5x+10=180
-10=-10
5x=170
5 = 5
x=34
2x+(2x+10)+x=180
5x+10=180
-10=-10
5x=170
5 = 5
x=34
yes they are similar
Expression without an equal sign with at least one variable
Hope this helps!