The ___ two sets is the set of elements but could be found in both sets at the same time

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

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Anyone know? will mark brainliest if you're correct!