Step 1. Expand
4b - 24 + 19
Step 2. Collect like terms
4b + (-24 + 19)
Step 3. Simplify
4b - 5
With the distributive property, you multiply whatever is one the outside of the parenthesis, by each term on the inside.
6a + 6b
Also, whats with the image? Lol.
<span>A Solution of a system of linear equations in two variables is an ordered pair that satisfies each equation in the system. identity like term empty set solution</span>
You want 
. We can go about this by casework. WLOG x=9, we have 8 digits: 1-8. With x=8 we have 2-9, but we already counted 8 and we already considered the 9 case, so we have 2-7 actually, which will give us 6 numbers. With x=7, with the same logic we are only looking for the numbers 3-6 which there are 4 of. With x=6, you are looking for the numbers 4-5 which are 2. With x=5 run out of numbers to pick. The numbers are indistinguishable and it does not matter whether we use x or y so we just have to ad up the cases we already have to get: 20.
Answer: $ 1.60
1.Set up the proportion, 2.5/4 = 1/x.
2. Cross multiply. 2.5x = 4
3. Divide both sides by 2.5. x = 1.6
