Question

Hallar el valor de x
A)x+9,78=87,5
B)x+(x+5,42)=45,78
C)2x=47,28

Answer 1

A. X= 87.5 - 9.78

X= 77.72

B. x+(x+5.42) = 45.78

x + x = 44.78 - 5.42

2x = 40,36

x= 40,36/2

x= 20.18

C. 2x = 47,28

x = 47,28/2

x= 23,64

Answer 2

$a)x + 9.78 = 87.5 \\ x = 87.5 - 9.78 \\ x = 77.72 \\ \\ b)x(x + 5.42) = 45.78 \\ x + x + 5.42 = 45.78 \\ 2x + 5.42 = 45.78 \\ 2x = 45.78 - 5.42 \\ 2x = 40.36 \\ x = 20.18 \\ \\ c)2x = 47.28 \\ x = 47.28 \div 2 \\ x = 23.64$