What is the answer to
5 x plus 8 plus 3 x equals 26 plus 6 x

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?