Question

Aflati valoarea expresiei: E=100×a-10×b, stiind ca: 100-b:16+350:7=144 a×42+720-720÷9=1060

Answer 1

ax42+720-720:9=1060
ax42+720-80=1060
ax42+720=1060+80
ax42+720=1140
ax42=1140-720
ax42=420
a=420:42
a=10


100-b:16+350:7=144
100-b:16+50=144
100-b:16=144-50
100-b:16=94
b:16=100-94
b:16=6
b=6×16
b=96

E=100xa-10xb
E=100x10-10x96
E=1000-960
E=40