A) 3x+4=21
3x=21-4
3x=17
x=17÷3
x= 5.7
1) Substitution from definition.
2) We use 
3) We are changing the order of 3 and 
.
4) We add 1 and 3 and we get 
5) Substitution from definition (but the other way than at the beginning).
Your answer for this problem would be 76-89+ 38, which equals negative 48
Answer: 3
Step-by-step explanation:
A simple way to calculate the distance between numbers on a number line is to count every number between them. A faster way is to find the distance by taking the absolute value of the difference of those numbers. We have to find PQ. TAking the difference we have 94-91= 3.
Well, first, the equation that you are looking for is Y = MX + B. To find B, look at the first dot on the Y-axis. It starts at positive 3, so, you know your equation will end with +3. Next, to find MX, start at the either dot, and find the Rise/Run. In this particular equation, the rise is 1, and, the run is -2, because it's going backwards (negative line). Meaning, the line's equation would be, f( x )= -1/2x + 3.
