Răspuns :
a)
x+2x=90grade
3x=90grade
x=90grade:3
x=30grade
b)
x+1/8x=90grade
9/8x=90grade
x=90grade:9/8
x=90grade*8/9
x=10grade*8
x=80grade
c)
x+(x+20grade)=90grade
x+x+20grade=90grade
2x=70grade
x=70grade:2
x=35grade
d)
x+(x-40grade)=90grade
x+x-40grade=90grade
2x=130grade
x=65grade
Sper că te-am ajutat!
x+2x=90grade
3x=90grade
x=90grade:3
x=30grade
b)
x+1/8x=90grade
9/8x=90grade
x=90grade:9/8
x=90grade*8/9
x=10grade*8
x=80grade
c)
x+(x+20grade)=90grade
x+x+20grade=90grade
2x=70grade
x=70grade:2
x=35grade
d)
x+(x-40grade)=90grade
x+x-40grade=90grade
2x=130grade
x=65grade
Sper că te-am ajutat!