Somone help me solve this appreciate it :)

Solve 2x+y=3 x+y=5 in substitution method

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50