To find the number, you add them up and divide by 2 to add them up conver the bottom number to the same number 7/8 and 1/9 factor 8=2 times 2 times 2 9=3 times 3 least common multiplue=2 times 2 times 2 times 3 times 3=72 7/8 times 9/9=63/72 1/9 times 8/8=8/72 add them 63/72+8/72=71/72 dividee by 2 same as multiplyu 1/2 71/72 times 1/2=71/144 the number is 71/144
First u need to distribute the -1 to (x + 4), creating the equation, -8 = -x - 4. Then add the -4 to both sides, and you get, -4 = -x. Then divide by -1 to both sides, and x = 4.
