Answer:
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"
351 because 293 multiplied by 3 = 879, and 1230 - 879 = 351
Answer: in decimal form its -2.17
exact form is -37/17
and mixed number form its -2 3/17
