Answer:
z (the arrow with teh line is pinting to the z) -4
Step-by-step explanation:
Answer:
3x+2x=5x but 4 can't add to 3x and 2x
It would be greater as 67 rounded up is 70 and 36 rounded up is 40 thus, you are multiplying two larger numbers than in your original equation which will result in a larger product.
Answer:
![x = \frac{5a-2} {7+5a}\\](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B5a-2%7D%20%7B7%2B5a%7D%5C%5C)
Step-by-step explanation:
Given the expressions
![x = \frac{5}{9y+5}....1\\y = \frac{5}{5a-2} ...2](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B5%7D%7B9y%2B5%7D....1%5C%5Cy%20%3D%20%5Cfrac%7B5%7D%7B5a-2%7D%20%20...2)
Substitute 2 into 1
![x = \frac{5}{9(\frac{5}{5a-2} )+5} \\x = \frac{5}{(\frac{45}{5a-2} )+5} \\x = \frac{5}{\frac{45+5(5a-2)}{5a-2} } \\x= \frac{5}{\frac{35+25a}{5a-2} }\\x = \frac{5(5a-2)} {35+25a}\\x = \frac{5(5a-2)} {5(7+5a})\\\\x = \frac{5a-2} {7+5a}\\](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B5%7D%7B9%28%5Cfrac%7B5%7D%7B5a-2%7D%20%29%2B5%7D%20%5C%5Cx%20%3D%20%5Cfrac%7B5%7D%7B%28%5Cfrac%7B45%7D%7B5a-2%7D%20%29%2B5%7D%20%5C%5Cx%20%3D%20%5Cfrac%7B5%7D%7B%5Cfrac%7B45%2B5%285a-2%29%7D%7B5a-2%7D%20%7D%20%5C%5Cx%3D%20%20%5Cfrac%7B5%7D%7B%5Cfrac%7B35%2B25a%7D%7B5a-2%7D%20%7D%5C%5Cx%20%3D%20%5Cfrac%7B5%285a-2%29%7D%20%7B35%2B25a%7D%5C%5Cx%20%3D%20%5Cfrac%7B5%285a-2%29%7D%20%7B5%287%2B5a%7D%29%5C%5C%5C%5Cx%20%3D%20%5Cfrac%7B5a-2%7D%20%7B7%2B5a%7D%5C%5C)