All you need to do here is multiply. 3 1/4 times 10. 3 times 10 is 30, 1/4 times 10 is 2 1/2. Add them together and your answer is 32 1/2 or 32.5 in decimal form.
Answer:
x=-4
Step-by-step explanation:
-3x +5 = 17
-3x+5-5=17-5
-3x=12
-3x/3 = 12/-3
x=-4
For this case we define the following variable:
- <em>x: number of stamps
</em>
We now write the equation that models the problem:

From here, we clear the value of x.
We have then:

Answer:
The number of stamps he has is:

3.9 · 0.5 + 4 5/6 ÷ 3 3/7
1.95 + 4 5/6 ÷ 3 3/7 multiplication left ot right
1.95 + 29/6 ÷ 24/7 convert to improper fraction
1.95 + 29/6 · 7/24 divide by fraction same as multiplication by reciprocal
1.95 + 203/144 multiply
1.95 + 1.40 (and a teensy bit more)
3.35