Respuestas

  • Usuario de Brainly
2013-12-19T23:49:50+01:00
A) 5x + √36 = 56
5x + 6 = 56
5x = 50
x = 10

b) 7x - 3² = 12
7x - 9 = 12
7x = 21
x = 3

c) 9x + 5 = 3
9x = 3 - 5
x = -2/9

d) 
5x-7=3* 17
5x - 7 = 51
5x = 58
x = 58/5