step-1: Given equation

step-2:

Since, in both sides , there is 7 in the denominator
so, we are dividing both sides by 7
so, division property
step-3:

we can see that 7 is getting cancelled with 7 on left side
and 7 is getting cancelled with -35 on right side
so, we are simplifying it
so, simplifying property
step-4:

we can see that 2 is added on left side and 2 is added on right side
so, we are adding 2 on both sides
so, addition property
step-5:

we can see that 2 on both sides are no more
it has been added with -2 on left side and -5 on right side
so, it will help in simplification
so, simplifying property