8/12 – y – 8/12 = 8/96 – 8/12

on the left side of the equation, the 8/12’s cancel each other out, and you are left with:

-y = 8/96 – 8/12

Now reduce the right side of the equation. Get the denominators the same (the bottom numbers) by multiplying the 8/12 x 8/8 (8/8 is the same as 1, so it doesn’t change the equation. That makes the top number 8×8, and the bottom number 8×12, or makes the fraction 64/96. So your new equation is

-Y = 8/96 – 64/96. Do the math on the right side, and you get

-Y = -56/96

Now multiply both sides by -1 to reverse the signs, and you get Y=56/96. Now reduce the fraction – I leave that to you.

#2 = RULE: the sum of all angles in a triangle = 180 degrees. If you already know 2 of the angles, the third one is 180 minus the other two angles.

Hope this helps, and you understand.

-y = 8/96 – 9/12 ( move the fraction to one side, when you move, you have to change sign)

-y = 1/12 – 9/12 (simplify the first fraction, so both fractions can add)

-y= -8/12

y= 8/12 (divide both sides by -1)

y=2/3( simplify)

2/ in a triangle, the sum of three angles is always 180 degree

since A^=60, B^=90,

and A^ + B^+ C =180

=> 60 + 90 + C^ =180

150 + C^ =180

C^= 180 – 150 (move 150 on the other side, so you have to change sign)

C^ = 30

2.) 30