When solving a system using substitution , if you obtain an identity, then the system has no solution

Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the equation for y, the number of pounds of walnuts he can buy. answer- b tomas added 6 to both sides of the equation instead of subtracting 6. just took the test

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

Which of the following is the result of expanding the series