Where do i put the parentheses:
7+3x4-1=39

Hi, can anyone show me how to do this problem? 100 points for this. in advance

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle

Which equation represents a line that passes through the point (9, -4) and has a slope of 3/5?