Answer:
Step-by-step explanation:look it up
72
107-9=98
98-78=90
90-7=83
83-6=7
77-5=72
72-4=68
68-3=65
700 easy math 20 times 35 equals 700
Answer:

Step-by-step explanation:
Hello,
let's find a and b reals so that


we identify the terms in 
9 = 3a
we identify the terms in x
-18 = 3b + a
we identify the constant terms
-7 = b
so ti goes with a = 9/3 = 3, b = -7
so we can write

so 
hope this helps