Given,
1218−618=1x
Let's simplify 1218−618.
Step 1: Subtract the numerators, put that answer over the common denominator.
=12−618
=618
Step 2: Simplify the fraction.
=2×32×3×3
Cancel out the common factors, we get
=13
1218−618=13
Given,
1218−618=1x
So, 13=1x
⇒x=3–