Question

Afla numarul necunoscut , folosind metoda mersului invers a) (A·5) +289 = 4 004. b) B( 1 000 - 9 ·65) = 8. c) C+98-291:3=100

Answer 1

5a=4004-289
5a=3715
a=3715:5
a=743

b(1000-585)=8
b×415=8
b=8:415
b=0.019

c+98-97=100
c+1=100
c=100-1
c=99