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sarah121868
30.10.2021 •
Mathematics
Resuelve cada una de las siguientes ecuaciones mostrando todos los PROCEDIMIENTOS:
Recuerda que los ejercicios que NO TENGAN procedimientos NO SE TENDRÁN EN CUENTA PARA LA
VALORACIÓN.
a) 7( − 5) = 20
b) −5( − 8) = 12
c) −3(2 + 15) = 3( + 3)
d) 7( − 2) = 2 −
e) ( + 3) + +/2= 93
f) ( − 3) + +/2= 9
g) 2(3−3)/5=4/(+3)2
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Ответ:
x= dimes y= quarters
x plus y= 24
10x plus 25y= 420
-10x plus -10y = -240
15y= 180
y= 12
x plus 12 =24
x=12
12 dimes and 12 quarters.