Question

afla valoarea necunoscutei : 56•3-a=13•7 ; m+113•5=278•3 ; n-76•4=534•2 ;

Answer 1

56x3-a=13x7
168-a= 91
a=168-91
a=77

m+113x5=278x3
m+565=834
m=834-565
m=269

n-76x4=534x2
n-304=1068
n=1068-304
n=764