Question

x - 9 = 10
X + 4 = - 8
x/2 +10 = 18
5x + 20 = - 55
3x + 5 = 2x - 5

Answer 1

Respuesta:

x - 9 = 10

x= 10 + 9

x = 19

X + 4 = - 8

x= -8 -4

x = -12

x/2 +10 = 18

$\frac{20+x}{2} = 18\\\\20+x = 18 *2\\20 +x = 36\\x = 36-20\\x= 16$

5x + 20 = - 55

5x = -55 -20

5x = -75

x = -75/5

x = -15

3x + 5 = 2x - 5

3x - 2x = -5 -5

x = -10

Explicación paso a paso: