To find the value of x, we know that supplementary angles add up to 180 degrees.
Therefore, we can set up an equation: 128 + 5x = 180
Subtract 128 from both sides: 5x = 52
Divide by 5 on both sides: x = 10.4
Therefore, the value of x is 10.4.
Consider the diagram of supplementary angles.
128°/5x°
What is the value of x?
1 answer