Erriinn
Erriinn
12-09-2018
Mathematics
contestada
Need help please and thank you
Respuesta :
maddiefred
maddiefred
12-09-2018
(10x+21) + (13x) = 90
23x + 21 = 90
-21 -21
23x = 69
/23 /23
x = 3
10(3) + 21
30 + 21 = 51
FEH = 51
13(3) = 39
DEH =39
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