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:

The constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality. <---definition
Hi DerpyIntelligence!
The product is addition so we do -3 1/4+-1 1/2. We solve it like this. We separate each part like this (-3)+(-1/4)+(-1)+(-1/2) then we solve the whole parts (-3)+(-1)=(-4). Next we find out the LCD of (-1/4) and (-1/2) which is 4 so we change (-1/2) to (-2/4) than we add (-1/4) which is (-3/4). Finally we add the wholes to the fractions (-4)+(-3/4)=(-4 3/4)
Hope this helps!
Answer:
x=35
Step-by-step explanation:
3x+7+68=180
3x+75=180
3x=105
x=35