Question

Pls help find the value of x

Answer 1

x = 15

Explanation:

<CBD and <DBA equal 90 degrees

5x - 10 + 3x - 20 = 90

8x - 30 = 90

8x = 120

x = 15

Answer 2

x=-5

Explanation:

First set the values equal to each other;

5x-10=3x-20

Add 10 to both sides;

5x-10+10=3x-20+10

Simplify;

5x=3x-10

Subtract 3x from both sides;

5x-3x=3x-10-3x

Simplify;

2x=-10

Divide both sides by 2;

2x/2=-10/2

Simplify 2x/2;

2/2=1

=x

Simplify -10/2;

Apply the fraction rule;

=-10/2

Divide the numbers ; 10/2

x=-5