Can anyone tell me what the pythrpgrees theory is ( wrong spelling)

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

What does x = in this equation x+3+2x=x+5

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol