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Buna !
Rezolvati ecuatiile :

a ) 130 * - x * = 60 * .
b ) x * + y * + 35 * = 60 *.

( * ) = grade.
Multumesc !


Răspuns :

130*-x*=60*
x*=130*-60*=70*
130*-70*=60*


x*+y*+35*=60*
x*=60*-35*=25*
x*=25*÷2=12,5*
y*=12,5
12,5*+12,5*+35*=60*