X + 6x + 13y + 4x
plz tell me the answer need help

Will give brainliest summations with algebraic expressions image shown

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.