Can you pls help with these I really need help​

for question one - x = 12

Step-by-step explanation:

a triangle is always 180, in other words you will add all the corners equal to 180

ex (for first question) - 7x -2 + 4x + 5x - 10 = 180

you add like terms, the x with x and single numbers with numbers, which results in 16x - 12 = 180. then you do the original operation "what you do to one sign of the equal side you do to the other"

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply