Question

daca a-2b=5 sa se afle x din relatiile urmatoare: a.)x+2a-4b=15; b.)25a+x-50b=200; c.)4a-8b-x=10.

Answer 1

x+2(a-2b)=15 x+2×5=15 X=15-10=5 : 25(a-2b)+x=200 25×5+x=200 x=200-125=75 4(a-2b)-x=10 4×5-x=10 x=20-10x=10