Answer:
It is called a linear system. :)
51
Step-by-step explanation:
39+3(4)=39+12=51
646.39
there u go.
7x + 6 = 55; x=7
"six more than" -> +6
"product of seven and a number" -> 7x
7x + 6 = 55
7x = 55 - 6
7x = 49
x=7
answer is 4
