Question

27+27/3/3-2xX=10+6/3

Answer 1

27+27/3/3-2X=10+6/3
27+27×3/3-2X=10+6/3
27+27-2X=10+6/3
54-2X=10+6/3 |×3
162-6X=30+6
162-6X=36
6X=162-36
6X=126
X=126:6
X= 21
sau
27+27-2X=12
54-2X=12
2X=54-12
2X=42
X=42:2
X=21