Okay, So For The First Question, We Need To Make An Equation.
3x = X + 100
Solve By Adding X to The Left Side.
4x = 100
Divide.
X = 100/4
100/4 = 25.
So:
X = 25
Question 2:
We Know That This Is A Right Angle
So:
7x + 27 = 90
Subtract 27.
7x = 90 - 27
90 - 27 = 63
7x = 63
Divide:
X = 63/7
63/7 = 9
X = 9
Question 3:
We Know That This Is A Right Angle. So:
8x - 6 = 90
Add 6
8x = 90 + 6
90 + 6 = 96.
8x = 96.
Divide:
X = 96/8
96/8 = 12
X = 12
