Since triangle has 3 180degrees
Thus for right abgled triangle 1 angle is 90 and the other is 180-90-35=55
Slope = (1-3)/(2/3 - 1/2) = (-2)/(1/6) = -12 units
First number is (x).
Second number is (2x+7).
Third number is (x-12).
Their sum is (x+2x+7+x-12).
x+2x+7+x-12 =131
You can simplify this equation
4x-5=131,
4x=136
x=136/4=34 (first number),
(2x+7)=34*2+7=75 (second number)
34-x=34-12 =22(third number)
Check: 34+75+22=131
Minus mean to subtract. With the symbol (-)
Therefore, the best algebraic expression should be y-12
The two expressions are not equivalent, you figure this out by solving both problems individually and seeing if the answer is the same as the other