How to work out 270 ÷ 30

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

Issof claims that the scale factor is 1/2. which statement about his claim is correct

Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the equation -1/2x+3=4-1/4x? a. -1/4x=1 b. -3/4x=1 c. 7=1/4x d. 7=3/4x