Respuesta :
m∠A + m∠B = 90
(3x + 5) + (2x - 15) = 90
(3x + 2x) + (5 - 15) = 90
5x - 10 = 90
+ 10 + 10
5x = 100
5 5
x = 20
m∠A = 3x + 5
m∠A = 3(20) + 5
m∠A = 60 + 5
m∠A = 65
m∠B = 2x - 15
m∠B = 2(20) - 15
m∠B = 40 - 15
m∠B = 25
(3x + 5) + (2x - 15) = 90
(3x + 2x) + (5 - 15) = 90
5x - 10 = 90
+ 10 + 10
5x = 100
5 5
x = 20
m∠A = 3x + 5
m∠A = 3(20) + 5
m∠A = 60 + 5
m∠A = 65
m∠B = 2x - 15
m∠B = 2(20) - 15
m∠B = 40 - 15
m∠B = 25
m∠A + m∠B = 90
[tex](3x + 5) + (2x - 15) = 90[/tex]
[tex] (3x + 2x) + (5 - 15) = 90[/tex]
[tex]5x - 10 = 90[/tex]
[tex]5x - 10 +10 = 90+10[/tex]
[tex]5x = 100[/tex]
[tex]5x/5 = 100/5[/tex] [tex]Divide \ both \ sides \ by \ 5[/tex]
[tex]x = 20[/tex] [tex]Solutions[/tex]
m∠A = [tex]3x + 5[/tex] [tex](x=20)[/tex]
m∠A = [tex]3(20) + 5[/tex] [tex]Substitute \ x \ for \ 20 [/tex]
m∠A = [tex]60 + 5[/tex] [tex]Simplify [/tex]
m∠A = [tex]65[/tex]
m∠B = [tex]2x - 15[/tex]
m∠B = [tex]2(20) - 15[/tex]
m∠B = [tex]40 - 15[/tex]
m∠B = [tex]25[/tex]
[tex](3x + 5) + (2x - 15) = 90[/tex]
[tex] (3x + 2x) + (5 - 15) = 90[/tex]
[tex]5x - 10 = 90[/tex]
[tex]5x - 10 +10 = 90+10[/tex]
[tex]5x = 100[/tex]
[tex]5x/5 = 100/5[/tex] [tex]Divide \ both \ sides \ by \ 5[/tex]
[tex]x = 20[/tex] [tex]Solutions[/tex]
m∠A = [tex]3x + 5[/tex] [tex](x=20)[/tex]
m∠A = [tex]3(20) + 5[/tex] [tex]Substitute \ x \ for \ 20 [/tex]
m∠A = [tex]60 + 5[/tex] [tex]Simplify [/tex]
m∠A = [tex]65[/tex]
m∠B = [tex]2x - 15[/tex]
m∠B = [tex]2(20) - 15[/tex]
m∠B = [tex]40 - 15[/tex]
m∠B = [tex]25[/tex]