Answer:
b+6=19
Step-by-step explanation:
by the words you can write your equation if you are looking to solve your answer would be 13

Add 7 to both sides

At the left hand side 7 will cancel 7
At the right hand side 7 will add up

Divide through by 2

simplify the fraction

so 253 doubles is 506, 506 divided by two = 253
therefore the answer will be '' 506 divided by 2 = 253''