x-3y=1
-5x=6y=14
441016.2600844
2379763
02399991
63289942
2987351
1629673
1619092
6879920
9579274
9646148.0906
9016128.1794
2 1/2 + 1/3 + 1/4
13.896 x 0.56
E=(sen30º+cos60º).ctg53º
x=y=4
-2x-2y=3
3200 ÷ 40 + 120% of 40 + ? = √729 * 8