Question

x2-5x+4=0

3/4x+5=x

obtenha a solução de cada equação
2x=16

y+5=9

3z-1=14

7=19-2x

10-4y=y

3-z=5z-15

Answer 1

x2-5x+4=0
-3x=-4
0= -4+3x
+4= 3x
x = 4/3

3/4x+5=x
3/3x= -5
3x= -5.3
x= -15/3
x= -5

2x= 16
x=16/2
x=8

Y+5=9
Y=4

3z-1=14
3z=15
z= 15/3
z=5

7=19-2x
2x = 12
x= 12/2
x= 6

10-4y=Y
10= 5y
Y=10/5
y=2

3-z=5z-15
18= 6z
z=18/6
z=3