The sum of the measures of angle x and angle y is 90. if the measure of angle x is 30 less than twice the measure of angle y, what is the measure of angle x?

The measure of angle x is 50 degree

Solution:

Given that  

Sum of the measures of angle x and angle y is 90

Also given that measure of angle x is 30 less than twice the measure of angle y

Need to determine x.

Twice of angle y = 2y

30 less than twice of angle y = 2y – 30

And as x is 30 less than twice of angle y, we get  

x = 2y – 30   (1)

Also as sum of measure of two angles is 90 so we get ,

x + y = 90

y = 90 – x     (2)

On substituting value of y from equation 2  , we get

x = 2(90 – x) – 30    

=> x = 180 – 2x – 30

=> x + 2x = 180 – 30

=> 3x = 150

=> x = 50

Hence measure of angle is 50 degree

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x