Question

resolvé las ecuaciones y verificá los resultados.
a) x + 81 - 23 = 204
b) x : 2 - 4 . 12 = 8
c) (x - 31) : 11 = 3
d) 20 : 4 + 3 . x = 59
                  2e) 9 . (x + 3 ) = 8 . 20 + 11

Answer 1

x + 81 - 23 = 204
x + 58 = 204
x = 204-58
x = 146

x : 2 - 4 . 12 = 8
x:2 -48 = 8
x:2 = 48+8
x:2 = 56
x = 112

(x - 31) : 11 = 3
x-31 = 33
x = 33-31
x = 2

20 : 4 + 3 . x = 59
5 + 3x = 59
3x= 59-5
3x = 54
x= 54/3
x = 18

9 . (x + 3 ) = 8 . 20 + 11
9(x+3) = 160 + 11
9(x+3) = 171
x+3  =  19
x = 19-3
x= 16