All you have to do is substitute one linear equation into the other one.
So, essentially you will have 2 linear equations side by side each other.
8/5x - 1 = -4/3x - 1
-1 = -4/3x - 8/5x - 1
The solution eventually equals 0.
Alrighty, so to order the quantities from least to greatest as asked for in the question, first we should convert all the values given to a specific way of writing (this being either decimal, fraction or mixed number). Since all but one is given in decimal form, we can convert the other mixed number to be the same.
An easy way to do this is by separating the mixed number from its corresponding fraction.

becomes

3+(3÷8)
You can long divide 3 and 8 to get 0.375
3+0.375 = 3.375
Now that all of the values are written in the same manner, order them from least to greatest.
3.75, 3.375, 2.625, 3.5
2.626, 3.375, 3.5, 3.75
~I hope this helps!~
Answer:
12.6
Step-by-step explanation:
The question requires you to estimate the product of 0.12 * 105
12/100 * 105 ----multiply 12 and 105
12 * 105 = 1260
Divide the answer by 100
1260/100 = 12.6